# In this assignment, you will write and balance a chemical equation. Then, you will use a table of enthalpyvalues to calculate the

In this assignment, you will write and balance a chemical equation. Then, you will use a table of enthalpy values to calculate the energy change in the reaction. Next, you will create a model of the energy change
in the reaction. Finally, you will write an explanation that describes the energy change in the reaction.
Background Information
Chemical bonds contain potential energy. The breaking and forming of bonds that occurs during a
chemical reaction results in the release or absorption of energy. Chemical reactions that release energy
into the surrounding environment are called exothermic reactions, while chemical reactions that absorb
energy from the surrounding environment are called endothermic reactions. Since energy is conserved
during chemical reactions, the total amount of energy in the reaction and the surrounding environment
remains the same.
During a chemical reaction, bonds in the reactants are broken and new bonds are formed in the products.
Energy is needed to break the bonds in the reactants, so breaking bonds is an endothermic process.
Forming new bonds, on the other hand, is an exothermic process because energy is released when new
bonds are formed in the products. A chemical reaction is an exothermic reaction if more energy is
released when new bonds are formed in the products than is used to break the bonds in the reactants
Conversely, if more energy is used to break the bonds in the reactants than is released when new bonds
are formed in the products, the chemical reaction is an endothermic reaction
The amount of energy change in a reaction can be determined by calculating the enthalpy of reaction
(AH). If the enthalpy of reaction is negative, then the reaction is exothermic If the enthalpy of reactions

## This Post Has 6 Comments

1. Areyano8299 says:

Thermochemical Equation

Thermochemistry

Thermochemical Equation

Define thermochemical equation.

Define heat of reaction.

What is the best way to heat a house?

Heating a home is becoming more and more expensive. Do we use gas, oil, electricity, wood? Part of the decision is based on which fuel will provide the highest amount of energy release when burned. Studies of thermochemistry can be very useful in getting reliable information for making these important choices.

a gas furnace

Thermochemical Equation

When methane gas is combusted, heat is released, making the reaction exothermic. Specifically, the combustion of 1 mol of methane releases 890.4 kilojoules of heat energy. This information can be shown as part of the balanced equation.

text{CH}_4(g)+2text{O}_2(g) rightarrow text{CO}_2(g)+2text{H}_2text{O}(l)+890.4 text{kJ}

The equation tells us that 1 mol of methane combines with 2 mol of oxygen to produce 1 mol of carbon dioxide and 2 mol of water. In the process, 890.4 kJ is released and so it is written as a product of the reaction. A thermochemical equation is a chemical equation that includes the enthalpy change of the reaction. The process in the above thermochemical equation can be shown visually in the Figure below .

2. gtrsoccer says:

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3. zackarygonzalez1028 says:

i dont know please i need brainliest or ima get wrecked.

Explanation:

4. crosales102 says:

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5. ruddymorales1123 says:

2 H2(g) + O2(g) → 2 H2O(ℓ) ΔH = −570 kJ

Explanation:

6. inucornspineapple says:

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