1st and 2nd laws

Question 1

0th law of thermodynamics

Answer 1

If T3=T2 and T1=T3,
then T1=T2

Question 2

Open system

Answer 2

Exchange of matter and energy with the surrounding

Question 3

Closed system

Answer 3

Exchange of energy only with the surrounding

Question 4

Isolated system

Answer 4

No exchange of matter and energy with the surrounding.
(No surrounding)

Question 5

Q

Answer 5

heat

Question 6

W

Answer 6

work

Question 7

U

Answer 7

internal energy

Question 8

1st law of thermodynamics

Answer 8

ΔU = Q + W

Question 9

ΔU is +

Answer 9

if temperature T increases

Question 10

ΔU is -

Answer 10

if temperature T decreases

Question 11

ΔU is 0

Answer 11

if temperature T is constant

Question 12

Q is +

Answer 12

if heat enters system

Question 13

Q is -

Answer 13

if heat exists system

Question 14

Q is 0

Answer 14

if no heat exchange

Question 15

W is +

Answer 15

if work is done on the system

Question 16

W is -

Answer 16

if work is done by the system

Question 17

W is 0

Answer 17

if volume is constant

Question 18

Adiabatic system

Answer 18

No exchange of matter and energy with the surrounding.
(can do/have work done)

Question 19

Isochoric

Answer 19

Closed system at constant volume

Question 20

Isobaric

Answer 20

Closed system at constant pressure

Question 21

Intensive property

Answer 21

Independent of the size of the system
(e.g. P, T)

Question 22

Extensive property

Answer 22

Scale linearly with the size of the system
(e.g. V, n)

Question 23

1 N (force)

Answer 23

1 kg.m/s²

Question 24

1 J (work)

Answer 24

1 N.m
1 kg.m²/s

Question 25

1 Pa (pressure)

Answer 25

1 N/m² 1 kg/m.s²

Question 26

Isothermal

Answer 26

Constant temperature in system (Heat transfer between system and surrounding)

Question 27

Reversible

Answer 27

Infinitely small change to the system

Question 28

Entropy (S)

Answer 28

measure of available microstates of the system = J/K = kg.m²/s².K⁻¹

Question 29

Enthalpy (H)

Answer 29

H = U + P.V

Question 30

Work on system (eq)

Answer 30

W = -M.g.Ah/A = -Pext .ΔV

Question 31

R constant

Answer 31

8,314 J/(K.mol)

Question 32

State function

Answer 32

do not depend on path (U, H, A, G)

Question 33

Path function

Answer 33

depend on path (Work, heat)

Question 34

Helmotz energy (A)

Answer 34

A = U - T.S

Question 35

Gibbs energy (G)

Answer 35

G = U + P.V - T.S

Question 36

heat

Answer 36

energy transfer (act of transfer)

Question 37

heat capacity

Answer 37

change in internal energy

Question 38

Exothermic reaction

Answer 38

releases energy (cold feeling)

Question 39

Endothermic reaction

Answer 39

absorbs energy (hot feeling)