Thermodynamics Flashcards
1
Q
Equation for change in internal energy
A
ΔU = 3/2 * n * R * ΔT
2
Q
Definition of an Isothermal Process
A
ΔT = 0, so ΔU = 0
3
Q
Definition of Isobaric Process
A
P = 0, so W = 0
4
Q
Equation for Work in terms of Ideal gasses
A
W = -P * ΔV
5
Q
Definition of Isochoric (isovolumetric) process
A
ΔV = 0, so W = 0
6
Q
Definition of Adiabatic Process
A
Q = 0, so W = Q
7
Q
Equation for work in heat engines
A
W = QH - QC
8
Q
Equation for the efficiency of a heat engine
A
e = (TH - TC) / TH
9
Q
Entropy
A
More random = more likely, so higher entropy in random states. In a closed system and heat engines, entropy is always increasing
10
Q
Second law of Thermodynamics
A
Heat goes from high temperature to low temperature. A device reversing natural heat flow is a heat pump.
11
Q
First law of Thermodynamics
A
W = U + Q
