Chemical Energy Flashcards
1
Q
Define Enthalpy
A
the measure of the chemical energy in a substance
2
Q
Define exothermic
A
term used when a reaction releases energy
3
Q
Define endothermic
A
term used when a reaction absorbs energy
4
Q
Define Enthalpy of combustions
A
the enthalpy change when 1 mole of the substance burns completely in oxygen
5
Q
Why does enthalpy of combustion need to be calculated
A
if reactions are exothermic, may have to prevent overheating
If reactions are endothermic, may be energy costs to maintain rate
6
Q
What is Hess’ Law
A
the idea that enthalpy change for a chemical reaction is independent of the route taken
7
Q
A
