What is a word equation for burning

2C2H6+7O2→4CO2+6H2O+ Heat.

What is the combustion of ethane?

Combustion. Combustion may also occur without an excess of oxygen, forming a mix of amorphous carbon and carbon monoxide. 2 C2H6 + 4 O2 → 2 C + 2 CO + 6 H2O + energy etc.

How do you find the combustion of ethane?

Calculate the heat of combustion of ethane, as described in the equation C2H6(g) + 3½O2(g) → 2CO2(g) + 3H2O(l), given the heats of formation of ethane gas, carbon dioxide gas and water liquid are –84.7 kJ mol-1, -393.5 kJ mol-1 and –285.8 kJ mol-1 respectively. Answer: C2H6(g) + 3½O2(g) → 2CO2(g) + 3H2O(l) ΔHc = ?

What happens when ethane is burned?

Ethane is a member of the alkane group and it has 2 carbon atoms. On heating, alkanes readily burn in air or oxygen producing carbon dioxide (CO2) and water (H2O). C2H6+72O2→2CO2+3H2O. So, the products of complete oxidation of ethane are 2 moles of carbon dioxide, and 3 moles of water.

Is ethane poisonous?

Ethane is an asphyxiant. Lack of oxygen can be fatal. Inhalation: This product is considered non-toxic by inhalation. Inhalation of high concentrations may cause central nervous system depression such as dizziness, drowsiness, headache, and similar narcotic symptoms, but no long-term effects.

What happens when ethane is burnt in oxygen?

Reaction between ethane and air When ethane is burnt in the air it leads to the formation of carbon dioxide and water. Apart from these products, the reaction releases a high amount of heat and light in the form of energies. It is a combustion reaction as one of the reactants involved in the reaction is oxygen.

What is the equation for when ethane burns in excess of oxygen?

When ethane is burnt in excess of oxygen, the oxidation number of carbon changes by (1) +8 (3) +3 (4) +4 (2) +7 LOVO.

What happens when ethanol burns in air?

When ethanol is burnt in air, it reacts with oxygen and produces Carbon dioxide, water vapors, and heat.

What happens when ethane undergoes complete combustion?

When elements are burned, the combustion reaction gives their most common oxides as the primary products. Thus, it can be seen that 7 molecules of oxygen are required for the complete combustion of 2 molecules of ethane. Hence, 72 molecules of oxygen are required for the complete combustion of 1 molecule of ethane.

What is a complete combustion?

Complete combustion happens when there is a good supply of air. Carbon and hydrogen atoms in the hydrocarbon fuel react with oxygen in an exothermic reaction: carbon dioxide and water are produced. energy is given out.

Is combustion of ethane endothermic?

It is exothermic. Different hydrocarbons produce different amounts of energy when combusted, or burned. As we know from above, the combustion of methane produces 802 kJ of energy. How much energy is produced from the combustion of ethane?

Is Melting endothermic or exothermic?

Melting is an endothermic reaction in which the total amount of heat in the substance, also known as the enthalpy, increases.

What type of reaction is octane?

The combustion of methane or octane is exothermic; it releases energy.

Is Melting ice endothermic or exothermic?

Basically, melting ice is an endothermic reaction because the ice absorbs (heat) energy, which causes a change to occur.

Is frying an egg exothermic or endothermic?

In this case of cooking an egg,the system(egg) gets heated up and for this the energy is taken from the environment(pan). So the reaction is an endothermic reaction. An exothermic reaction can be as simple as burning wood.

Is Melting always endothermic?

It requires energy for a solid to melt into a liquid. However, it can be used for both the melting and the solidification processes as long as you keep in mind that melting is always endothermic (so ΔH will be positive), while solidification is always exothermic (so ΔH will be negative).

Is Melting exothermic?

Because we must add heat, boiling water is a process that chemists call endothermic. Clearly, if some processes require heat, others must give off heat when they take place. These are known as exothermic. Changes of state involve a solid melting, a liquid freezing, a liquid boiling or a gas condensing.

Is Melting Gold exothermic?

Learn more physics! No, heat has to be added to make copper melt. So that’s called an endothermic process. When copper freezes it releases heat, so that’s called exothermic. The same pattern is true for any melting/freezing process where the melted state is the hotter one, as it almost always is.

What is exothermic reaction formula?

The general equation for an exothermic reaction is: Reactants → Products + Energy. If the energy produced in an exothermic reaction is released as heat, it results in a rise in temperature.

Why is freezing exothermic?

When water becomes a solid, it releases heat, warming up its surroundings. This makes freezing an exothermic reaction. Usually, this heat is able to escape into the environment, but when a supercooled water bottle freezes, the bottle holds much of that heat inside.

Is the formation of ice endothermic?

As aresult, the frezing of water is an exothermic process because heat is being removed from the system. Melting ice is an endothermic process because you need to provide heat in order to allow the molecules to overpower the hydrogen bonds and start moving about again.

Is Freezing always exothermic?

Freezing is almost always an exothermic process, meaning that as liquid changes into solid, heat and pressure are released.

Which is exothermic process?

In thermodynamics, the term exothermic process (exo- : “outside”) describes a process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light (e.g. a spark, flame, or flash), electricity (e.g. a battery), or sound (e.g. explosion heard when burning …

What are two examples of exothermic?

Here are some of the examples of exothermic reaction:

• Making of an ice cube. Making ice cube is a process of liquid changing its state to solid.
• Snow formation in clouds.
• Burning of a candle.
• Rusting of iron.
• Burning of sugar.
• Formation of ion pairs.
• Reaction of Strong acid and Water.
• Water and calcium chloride.

Is the sun exothermic?

Re: Endothermic/exothermic As far as processes being exothermic or endothermic, for the sun the process would be exothermic – it’s releasing heat – and for the water the process would be endothermic – it’s taking up heat.

Is exothermic hot or cold?

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. An endothermic process absorbs heat and cools the surroundings.”

Is a hot pack endothermic?

Hot Pack/ Cold Pack. Chemicals can store energy and release it in the form of heat. A chemical reaction that releases heat is called an exothermic reaction. These reactions are called endothermic reactions.

Is water cooling exothermic?

Explanation: Hot water will lose (give off) heat energy to cool down. Hence, it is an exothermic process.

Is endothermic warm blooded?

Endotherms are warm-blooded animals and ectotherms are cold-blooded animals. The major difference between the two is that endotherms are able to generate and maintain constant body temperature.

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The word equation for the burning of a candle is wax plus oxygen yields carbon dioxide and water. This is an exothermic reaction that produces both light and heat.

The fuel for a burning candle is the wax. There are many different types of wax with a corresponding number of chemical formulas, but they are all hydrocarbons. Hydrocarbons are molecules made from hydrogen and carbon.

Burning the wax pulls the hydrogen and carbon in the wax apart and recombines them with oxygen from the atmosphere. This is an oxidation reaction. The resulting carbon dioxide and water are gases that disperse in the air.

MORE FROM REFERENCE.COM

What is a word equation to show burning reactions?

The general equation for a complete combustion reaction is: Fuel + O2 → CO2 + H2O. The burning of charcoal is a combustion reaction.

What is the chemical formula for burning?

What type of chemical reaction is p4 O2 → P2O5?

Type of Chemical Reaction: For this reaction we have a combination reaction. Balancing Strategies: This combination reaction is a lot easier to balance and if you can get an even number of oxygen atoms on the reactants side of the equation. You can do this by multiplying the diphosphorous pentoxide (P2O5) by two.

What is a word equation?

A word equation represents a chemical reaction using the names of the substances involved. Word equations do not show any chemical symbols or formulae.

What is CH4 in chemistry?

Methane (CH4) Methane is a colorless, odorless, flammable gas that is the simplest hydrocarbon and is the major constituent of natural gas. Methane is present in the Earth’s atmosphere at low concentrations and acts as a greenhouse gas.

What is chemistry of fire?

Fire is a chemical reaction in which energy in the form of heat is produced. When forest fuels burn, there is a chemical combination of the oxygen in the air with woody material, pitch and other burnable elements found in the forest environment. The combustion process or fire is sometimes called rapid oxidation.

What is the basic chemistry of fire?

Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce plasma.

What is the chemical equation for p2o5?

P₂O₅
Phosphorus pentoxide/Formula

What is the word equation for octane and oxygen?

How would you balance the equation for the combustion of octane: C8H18(l)+O2(g)—->CO2(g)+H2O(l)? Socratic.

Which is the correct chemical formula for naphthalene?

The chemical formula for naphthalene is C10H8 , and its molecular weight is 128.19 g/mol. (1) Naphthalene occurs as a white solid or powderthat is insoluble in water. (1,8) Naphthalene has a strong, mothball odor, with an odor threshold of 0.44 mg/m. 3. (0.084 parts per million, ppm).

Where does naphthalene come from in the air?

(1) Workers may be occupationally exposed to naphthalene during its manufacture and use, especially in coal- tar production, wood preserving, tanning, or ink and dye production. (1) Naphthalene is released to the air from the burning of coal and oil and from the use of mothballs.

What are the different names for naphthalene tar?

Other names: Albocarbon; Dezodorator; Moth flakes; Naphthalin; Naphthaline; Naphthene; Tar camphor; White tar; Camphor tar; Moth balls; Naftalen; NCI-C52904; Mighty 150; Mighty RD1; Rcra waste number U165; UN 1334; UN 2304; NSC 37565 Permanent link for this species. Use this link for bookmarking this species for future reference.

How much does naphthalene weigh in PubChem CID 931?

PubChem CID 931 Synonyms naphthalene 91-20-3 Naphthalin Naphthene Molecular Weight 128.17 Dates Modify 2021-07-03 Create 2005-03-26

In chemistry, a word equation is a chemical reaction expressed in words rather than chemical formulas. A word equation should state the reactants (starting materials), products (ending materials), and direction of the reaction in a form that could be used to write a chemical equation.

There are some key words to watch for when reading or writing a word equation. The words «and» or «plus» mean one chemical and another are both reactants or products. The phrase «is reacted with» indicates the chemicals are reactants. If you say «forms», «makes», or «yields», it means the following substances are products.

When you write a chemical equation from a word equation, the reactants always go on the lefthand side of the equation, while the reactants are on the righthand side. This is true even if the products are listed before the reactants in the word equation.

Word Equation Examples

The chemical reaction 2 H₂(g) + O₂(g) → 2 H₂O(g) would be expressed as:

hydrogen gas + oxygen gas → steam
As a word equation or as «Hydrogen and oxygen react to form water» or «Water is made by reacting hydrogen and oxygen.»

While a word equation doesn’t ordinarily include numbers or symbols (Example: You wouldn’t say «Two H two and one O two makes two H two O», sometimes it is necessary to use a number to indicate the oxidation state of a reactant so that a person writing a chemical equation can do it correctly. This is mostly for the transition metals, which can have multiple oxidation states.

For example, in the reaction between copper and oxygen to form copper oxide, the chemical formula of copper oxide and the number of copper and oxygen atoms involved depends on whether copper(I) or copper(II) participates in the reaction. In this case, it would be fine to say:

copper + oxygen → copper(II) oxide

or

Copper reacts with oxygen to produce copper two oxide.

The (unbalanced) chemical equation for the reaction would start out as:

Cu + O₂ → CuO

Balancing the the equation yields:

2Cu + O₂ → 2CuO

You would get a different equation and product formula using copper(I):

Cu + O₂ → Cu₂O

4Cu + O₂ → 2Cu₂O

More examples of word reactions include:

• Chlorine gas reacts with methane and carbon tetrachloride to produce hydrogen chloride.
• Adding sodium oxide to water produces sodium hydroxide.
• Iodine crystals and chlorine gas react to make solid iron and carbon dioxide gas.
• Zinc and lead two nitrate make zinc nitrate and lead metal.
  which means: Zn + Pb (NO₃)₂ → Zn(NO₃)₂ + Pb

Why Use Word Equations?

When you’re learning general chemistry, work equations are used to help introduce the concepts of reactants, products, the direction of reactions, and to help you understand precision of language. They may seem annoying, but are a good introduction to the thought processes required for chemistry courses. In any chemical reaction, you need to be able to identify the chemical species that react with each other and what they make.

Word Equations in Other Sciences

Chemistry isn’t the only science to use equations. Physics equations and mathematical equations may also be expressed in words. Usually in these equations two statements are set to be equal to each other. For example, if you way «force equals mass multiplied by acceleration» then you are providing the word equation for the formula F = m*a. Other times, one side of the equation may be less than (<), greater than (>), less than or equal to, or greater than or equal to the other side of the equation. Addition, subtraction, multiplication, division, logs, square roots, integrals, and other operations can be stated in word equations. However, complex equations that contain parentheses to describe the order of operations are very hard to understand as word equations.

Source

• Brady, James E.; Senese, Frederick; Jespersen, Neil D. (December 14, 2007). Chemistry: Matter and Its Changes. John Wiley & Sons. ISBN 9780470120941.

What is combustion?

Jump to

Key points

• Combustion is another name for burning.
• In a combustion reaction, fuel is burned and reacts with oxygen to release energy.

What do petrol, natural gas, wood and coal have in common?

They are all fuels, which means that they can be burned to release energy.

Video

Watch the video below to find out what happens during a reaction.

While you are watching, think about the meanings of combustion, fuel and oxidation.

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Katie: Dr. Tim Gregory knows a thing or two about creating things that go BANG and BOOM.

So, given today’s subject is all about chemical reactions, we couldn’t be in better company. We’re looking at combustion and oxidation in relation to chemical reactions. I mean, it sounds really exciting, sir. But, what do we actually need to to get started?

Dr. Tim: It is really exciting. This is one of my favourite subjects. So, combustion is a chemical reaction when a fuel is burned to release energy. A fuel is a substance which is burned to release energy in a useful way. And the final thing we need to know is oxidation. This is when a substance gains an oxygen atom in a reaction and this happens during combustion.

Katie: Um, excited. This really does sound like fun. Can you give us an example?

Dr. Tim: There are loads of examples of combustion, but I think it’s best we explore this for now on a piece of paper. I’m going to show you the fire triangle. And this shows the three things that we need for a fire to start. The first thing we’ve got is a fuel and this is what we’d burn to release useful energy. The second thing we’ve got is oxygen and in the case of a fire we get the oxygen from the air. And the third thing that we need is to start a fire — we need a heat source.

These are the three things that we need to start a fire. And if just one of the sides is taken away from the fire triangle, the fire will not start. And, a fire that is already burning will quickly go out. And firefighting relies on these principles, so it’s really important that we understand the science behind how fires work. The fire will go out when the fuel runs out, for example. But, it’s often really unsafe to leave a fire for that long and so different types of fires need to be tackled in slightly different ways.

Katie: It’s really interesting, sir. But, it’s also so important to have this knowledge, isn’t it? So that’s why if you ever find yourself with a chip pan or oil fire, for example, you cover the pan with a damp cloth because that is removing the oxygen.

Dr. Tim: Absolutely. You remove the oxygen from the fire triangle and the chip pan fire will go out.

What are the three parts of the fire triangle?

A fuel, oxygen and heat are needed for a fire. If one of these is removed, a fire will go out.

What is a combustion reaction?

Combustion is another word for burning. In a combustion reaction, a is heated and it reacts with oxygen.

The fire triangle summarises the three things needed for combustion — a fuel, heat and oxygen. If one of these things is removed from a fire, the fire goes out.

When fuels burn in combustion reactions, they release useful thermal energy (heat). Combustion reactions are used to heat our homes, power most cars, and to generate a lot of our electricity.

What is the difference between combustion and burning?

Nothing! They mean the same thing. Combustion is the scientific word for burning.

Oxidation reactions

An reaction is one where a substance reacts with oxygen and produces oxides. An oxide is a chemical compound that contains at least one oxygen atom and one other element in its chemical formula. Combustion is an example of an oxidation reaction.

Many fuels contain carbon and hydrogen atoms. These fuels burn to produce oxides, carbon dioxide and water. Water, H₂O, is dihydrogen monoxide. Carbon dioxide, CO₂, is a that causes .

Water could also have the chemical name dihydrogen oxide or dihydrogen monoxide because two hydrogen atoms are bonded to one oxygen atom.

Petrol is a fuel which is used in cars. Petrol is made from molecules which contain only carbon and hydrogen atoms. What is produced when petrol burns in a car engine?

Carbon dioxide (CO₂) and water (H₂O) which are both oxides.

Working scientifically

Working safely with combustion in the lab

Combustion reactions can be investigated in a science lab.

If you are working with combustion it is important to work safely.

To work safely, you need to identify hazards eliminate them, or if this isn’t possible, control the risk.

What safety precautions would you take to protect yourself when investigating combustion reactions?

• Wearing safety goggles
• Wearing protective gloves
• Wearing a protective lab coat.
• Tying back hair and tucking away loose clothing, such as ties.

These precautions will help reduce the risk of injury from the combustion investigation like getting burnt.

Combustion equations

Combustion reactions can be described using word and symbol equations.

The fuel used in gas barbeques is butane. Butane molecules contain only carbon atoms and hydrogen atoms and it is written as C₄H₁₀.

When the butane burns, the carbon atoms react with oxygen in the air and carbon dioxide, and the hydrogen atoms react with oxygen to make water.

The word equation for the combustion of butane is, butane + oxygen → carbon dioxide + water.

The symbol equation for the combustion of butane is, C₄H₁₀ + O₂ → CO₂ + H₂O

Like all combustion reactions, oxygen will always be one of the and be on the left of the equation. Most combustion reactions produce carbon dioxide and water, so these chemicals are written as the on the right of the equation.

Charcoal is a fuel that contains carbon atoms but no hydrogen atoms. What is the word equation for the combustion reaction which occurs in a charcoal barbeque?

Carbon + oxygen → carbon dioxide

Video

Watch this video to see how a combustion reaction can be represented with a word and symbol equation.

CH₄ is the formula for methane, the largest component of the natural gas used by the oven.

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I have a gas igniter here which I use everyday so I don’t burn my fingers, because when I use matches, that’s what happens.

In the video, methane reacts with oxygen in a combustion reaction. What is the product?

The product of the reaction is carbon dioxide (CO₂) and water (H₂O).

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