1st and 2nd laws Flashcards
1
Q
0th law of thermodynamics
A
If T3=T2 and T1=T3,
then T1=T2
2
Q
Open system
A
Exchange of matter and energy with the surrounding
3
Q
Closed system
A
Exchange of energy only with the surrounding
4
Q
Isolated system
A
No exchange of matter and energy with the surrounding.
(No surrounding)
5
Q
Q
A
heat
6
Q
W
A
work
7
Q
U
A
internal energy
8
Q
1st law of thermodynamics
A
ΔU = Q + W
9
Q
ΔU is +
A
if temperature T increases
10
Q
ΔU is -
A
if temperature T decreases
11
Q
ΔU is 0
A
if temperature T is constant
12
Q
Q is +
A
if heat enters system
13
Q
Q is -
A
if heat exists system
14
Q
Q is 0
A
if no heat exchange
15
Q
W is +
A
if work is done on the system
