7 Thermochemistry Flashcards
1
Q
1st Law of Thermodynamics
internal energy
A
delta U = Q - W
Q: heat added
W: work done by system
2
Q
isothermal process
A
constant temperature = constant total internal energy
3
Q
adiabatic process
A
no heat exchange
Q = 0
change in internal energy equals the negative work done by system
4
Q
isobaric process
A
constant pressure does not alter 1st Law
5
Q
isovolumetric/isochoric process
A
constant volume
W = 0
change in internal energy equals heat added
6
Q
coupling reactions
A
to make for a spontaneous overall reaction
7
Q
state functions
A
systems in equilibrium
8
Q
process functions
A
pathway taken from one equilibrium to another
9
Q
“STP”
A
273 K x 1 atm
10
Q
“standard conditions”
A
298 K x 1 atm x 1 M
11
Q
0th Law of Thermodynamics
A
objects in thermal equilibrium only when their temperatures are equal
