?	catalyst
?	one calorie
?	exothermic
?	temperature
?	enthalpy
?	specific heat capacity
?	heat
1?	reaction intermediate
?	activation energy
?	endothermic

1.	The sum of all forms of kinetic and potential energies of a system plus the product of PV.
2.	The minimum increase in potential energy in a reaction pathway required for a reaction to occur.
3.	A substance that alters a reaction mechanism, resulting in a higher rate of reaction, but is not consumed in the overall reaction mechanism.
4.	Molecules that form as short-lived products in a reaction mechansism.
5.	The energy required to raise the temperature of 1 gram of a substance by 1 degree Celsius.
6.	The transfer of energy across a boundary from system to surroundings, or vice versa.
7.	The average kinetic energy of the particles in a sample of matter.
8.	4.184 joules
9.	A reaction where kinetic energy is released from a chemical system to the surroundings.
10.	Bond breaking is an _____________ process.