KTG

Question 1

Vcritical =

Answer 1

3b

Question 2

Pcritical

Answer 2

a/27b^2

Question 3

Tcritical

Answer 3

8a/27Rb

Question 4

PV/RT

Answer 4

3/8

Question 5

Mean free path

Answer 5

(1/root2 ) 1/npid^2

Question 6

Relaxation time

Answer 6

(1/v) * 1/npid^2

Question 7

No of degrees of freedom in a vibrational mode

Answer 7

2

Question 8

PV^x = constant, C = ?

Answer 8

C = Cv + R/1-x

Question 9

volume coeff at high temp

Answer 9

becomes constant

Question 10

MP with inc in pressure

Answer 10

decreases(ice exp)

Question 11

BP with inc in pressure

Answer 11

Inc

Question 12

Newton’s law of cooling graph equation:

Answer 12

dQ/dt = -k(T2-T1)

ms dT/dt = -k(T2 -T1)

log(T2 - T1) = -kt

Question 13

Adiabatic wall fixed vs movable

Answer 13

Fixed: A and B are independent of each other
Movable: Pa = Pb

Question 14

Diathermic fixed vs movable

Answer 14

Fixed: Ta = Tb
Movable: Ta = Tb, Pa = Pb

Question 15

Tyre bursting:

Answer 15

Irreversible adiabatic

Question 16

Work done in adiabatic process

Answer 16

W = (P1V1 - P2V2)/ (gamma -1)
W = nR(T1 - T2)/(gamma - 1)

Question 17

Efficiency of fridge

Answer 17

Q2/W * 100

Question 18

Efficiency of engine

Answer 18

W/Q1 * 100

Question 19

Specific heat capacity of a solid

Answer 19

3R

C = delta Q/ delta T = deltaU/deltaT

Question 20

One calorie definition

Answer 20

Amt of heat required to heat solid from 14.5degC to 15.5degC

Question 21

delta U extensive or intensive

Answer 21

extensive

Question 22

Second law points

Answer 22

Efficiency of engine can never be 1

Efficiency of fridge can never be inf

Question 23

Kelvin Planck statement

Answer 23

Complete conversion of heat to work not possible

Question 24

Clausius statement

Answer 24

Heat can never flow from cold to hot body without any work

Question 25

Example of reversible process

Answer 25

Quasistatic isothermal expansion of ideal gas

Question 26

Carnot engine processes

Answer 26

Reversible, adiabatic