Thermal

Question 1

zeroth law of thermodynamics

Answer 1

If C is initially in thermal equilibrium with both A and B then A and B are also in thermal equilibrium with eachother

Question 2

First law of thermodynamics

Answer 2

delta U = Q + W

Question 3

Internal energy of an ideal gas

Answer 3

depends only on its temperature not on its pressure or volume

Question 4

Heat capacity of an ideal gas

Answer 4

Cp=Cv+R

Question 5

Cp

Answer 5

molar heat capacity at constant pressure

Question 6

Cv

Answer 6

molar heat capacity at constant volume

Question 7

relationship between Cp and Cv

Answer 7

gamma = Cp/Cv

Question 8

Adiabatic process for an ideal gas

Answer 8

PV^gamma = constant
TV^(gamma-1) = constant

Question 9

kinetic theory of gases

Answer 9

PV=1/3Nm

PV=2/3N

Question 10

u

Answer 10

total internal energy

Question 11

PV for monatomic gas

Answer 11

PV = 2/3 U

Question 12

PV gamma relation

Answer 12

PV=(gamma-1)U

Question 13

Clausius 2

Answer 13

It is impossible to construct a cyclical machine whose sole effect is to transfer energy continuously by heat from one object at a higher temperature without the input of energy by work.

Question 14

Kelvin-Planck

Answer 14

it is impossible to construct a heat engine that, operating in a cycle produces no effect other than the input of energy by heat from a reservoir and the performance and an equal amount of wor

Question 15

efficiency equation

Answer 15

e=W/Qh

Question 16

efficiency equation

Answer 16

e=W/Qh = (Qh-Qc)/Qc = 1-Qc/Qh

Question 17

adiabatic QU

Answer 17

Q=0

delta U = W

Question 18

Isothermal QUW

Answer 18

delta U =0 Q=-!

Question 19

four stages of an ideal carnot engine

Answer 19

isothermal expansion
adiabatic expansion
isothermal compression
adiabatic compression

Question 20

entropy equation

Answer 20

Q1/T1 = S = Q2/S2

Question 21

Change in entropy in isothermal expansion

Answer 21

increase in entropy S = Qh/Th

Question 22

change in entropy in isothermal compression

Answer 22

decrease in entropy S=Qc/Tc

Question 23

Reversible process

Answer 23

• the intermediate steps are known
• the system is never far from equilibrium
• the system can be returned to its original state

Question 24

irreversible process

Answer 24

• the intermediate steps are not known
• non-equilibrium states are involved
• it is not possible to run backwards, occurs naturally in one direction only.

Question 25

What is the enclosed part of a Carnot cycle graph

Answer 25

The work done