unit 3 terms Flashcards
1
Q
Thermochemistry
A
- the study of the energy changes that accompany physical and chemical changes in matter
2
Q
Thermal Energy
A
- energy available from a substance as a result of the motion of its molecules
3
Q
Chemical system
A
- set of reactants and products under study
4
Q
Surrondings
A
- all matter around the system that is capable of abosrbing or releasing energy
5
Q
Closed System
A
- energy can move in and out, but not matter
6
Q
Calorimetry
A
- process of measuring energy changes in a chemical system
7
Q
Specific heat capacity
A
- Quantity of heat required to raise the temp of a mass unit by 1*C or 1k
8
Q
Enthalpy Change ( ΔH)
A
- Difference in enthalpies of reactants and products
9
Q
Enthalpy
A
- Is a measure of the total energy of a thermodynamic system
10
Q
Heat
A
- amount of energy transferred between substances
11
Q
Exothermic
A
- release of energy
12
Q
Endothermic
A
- absorption of energy.
13
Q
Temperature
A
- average kinetic energy of the particles in a sample of matter.
14
Q
Open system
A
- system where matter and energy can move in and out.
15
Q
Isolated system
A
- Ideal system where neither matter or energy can move in or out
