Thermodynamics Flashcards
1
Q
temp conversions
A
F = (9/5)C + 32
K = C + 273
2
Q
thermal expansion
A
ΔL = αLΔT
3
Q
volumetric thermal expansion
A
ΔV = βVΔT
β = 3α
4
Q
isolated systems
A
- not capable of exchanging energy or matter with their surroundings
- total change in internal energy must be zero
- bomb calorimeter
5
Q
closed systems
A
- capable of exchanging energy but not matter w the surroundings
- like gases in vessels
6
Q
open systems
A
- can exchange both matter and energy
7
Q
state functions
A
pressure, density, temp, volume, enthalpy, internal energy, gibbs free energy, entropy
8
Q
process functions
A
describe the path taken to get from one state to another
heat, work
9
Q
change in internal energy
A
ΔU = Q - W
10
Q
+W
A
work is done by system (expansion)
11
Q
-W
A
work is done on the system (compression)
12
Q
heat unit conversions
A
1 Cal = 10^3 cal = 4184 J = 3.97 BTU
13
Q
conduction
A
the direct transfer of energy from molecule to molecule through molecular collisions
14
Q
convection
A
the transfer of heat by the physical motion of a fluid over a material
15
Q
radiation
A
energy transfer by EM waves
