1
Q
Temperature
A
- Tells you in which way the thermal energy will move
- depends on average KE
2
Q
Thermal energy
A
- depends on size and composition
- energy associated with motion of particles
- joules
3
Q
Heat
A
The transfer of thermal energy from one place to another
4
Q
First law of thermodynamics
A
Energy cannot be be created or destroyed
5
Q
Endothermic
A
Heat in (thermal energy +)
6
Q
Exothermic
A
Heat out (thermal energy negative)
7
Q
Enthalpy
A
Heat absorbed or emitted during a reaction under constant pressure
🔺H=q
8
Q
The second law of thermodynamics
A
For any change in a system, the entropy must increase (energy can’t be used again)
9
Q
Entropy
A
A measure of possible arrangements of a given system(J)
10
Q
Internal energy
A
Sum of all the KE and PE of all the particle in the system
CEM 141
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