Thermochemical Equations

Vocabulary

100

the “heat content” of a system or the potential of a system to create heat

Enthalpy

200

processes transfer heat from a system to surroundings

Exothermic

300

process that transfers heat from surroundings to system

Endothermic

400

measure of bond strength in a chemical bond, and is the amount of energy needed to break atoms apart in a molecular bond

Bond Energy

Graphs

100

Exothermic

Draw you graph

200

Endothermic

Draw your graph

Concepts

100

change in enthalpy when one mole of substance if formed under pure elements

Standard Enthalpy of Formation

Calculations

100

Steps:

1.Convert given amount of substance from grams to moles dividing by molar mass

2.Multiply that number of moles by ratio of ΔH term to coefficient in balanced equation.

Calculations with Thermochemical equations