Enthalpy

Pressure

Entropy

None of these

C. Entropy

Expansion of an ideal gas against constant pressure

Atmospheric pressure vaporisation of water at 100°C

Solution of NaCl in water at 50°C

None of these

Minimum

Zero

Maximum

None of these

Gibbs-Duhem equation

Gibbs-Helmholtz equation

Third law of thermodynamics

Joule-Thomson effect

Maxwell's equation

Clausius-Clapeyron Equation

Van Laar equation

Nernst Heat Theorem

Sublimation

Vaporisation

Melting

Either (A), (B) or (C)

Enthalpies of all elements in their standard states are assumed to be zero

Combustion reactions are never endothermic in nature

Heat of reaction at constant volume is equal to the change in internal energy

Clausius-Clapeyron equation is not applicable to melting process

Equilibrium cannot be established

More ice will be formed

More water will be formed

Evaporation of water will take place

0°C

273°C

100°C

-273°C

30554

10373

4988.4

4364.9

No heat and mass transfer

No mass transfer but heat transfer

Mass and energy transfer

None of these

-19.4

-30.2

55.2

-55.2

H = E - PV

H = F - TS

H - E = PV

None of these

Directly proportional

Inversely proportional

Equal

None of these

Entropy

Gibbs free energy

Internal energy

All (A), (B) & (C)

0

1

2

3

The available energy in an isolated system for all irreversible (real) processes decreases

The efficiency of a Carnot engine increases, if the sink temperature is decreased

The reversible work for compression in non-flow process under isothermal condition is the change in Helmholtz free energy

All (A), (B) and (C)

Fusion

Vaporisation

Transition

None of these

Does not need the addition of external work for its functioning

Transfers heat from high temperature to low temperature

Accomplishes the reverse effect of the heat engine

None of these

Use of only one graph for all gases

Covering of wide range

Easier plotting

More accurate plotting

Heat pump

Heat engine

Carnot engine

None of these

High thermal conductivity

Low freezing point

Large latent heat of vaporisation

High viscosity

Ice at the base contains impurities which lowers its melting point

Due to the high pressure at the base, its melting point reduces

The iceberg remains in a warmer condition at the base

All (A), (B) and (C)

Adiabatic

Isothermal

Isometric

None of these

Triple point

Boiling point

Below triple point

Always

∞

+ve

0

-ve

Freon-12

Ethylene

Ammonia

Carbon dioxide

Heat capacity

Molal heat capacity

Pressure

Concentration

Increases

Decreases

Remains unchanged

May increase or decrease; depends on the gas

50 kcal/hr

200 BTU/hr

200 BTU/minute

200 BTU/day

0

273

25

None of these