With increase in temperature, the internal energy of a substance___________________?
(A) Increases
(B) Decreases
(C) Remains unchanged
(D) May increase or decrease; depends on the substance
(∂H/∂T)P is the mathematical expression for____________________?
(A) CV
(B) Entropy change
(C) Gibbs free energy
(D) None of these
Which of the following is not an equation of state ?
(A) Bertholet equation
(B) Clausius-Clapeyron equation
(C) Beattie-Bridgeman equation
(D) None of these
The melting point of paraffin wax (which contracts on solidification) _______________ with pressure rise?
(A) Increases
(B) Decreases
(C) Remains unchanged
(D) Decreases linearly
In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when___________________?
(A) Cp < Cv
(B) Cp = Cv
(C) Cp > Cv
(D) C ≥ Cv
The internal energy of an ideal gas does not change in a reversible _____________ process?
(A) Isothermal
(B) Adiabatic
(C) Isobaric
(D) Isometric
Which of the following decreases with increase in pressure ?
(A) Melting point of ice
(B) Melting point of wax
(C) Boiling point of liquids
(D) None of these
Near their critical temperatures, all gases occupy volumes _____________ that of the ideal gas?
(A) Less than
(B) Same as
(C) More than
(D) Half
Boiling of liquid is accompanied with increase in the__________________?
(A) Vapor pressure
(B) Specific Gibbs free energy
(C) Specific entropy
(D) All (A),
Refrigeration capacity of a household refrigerator may be round about _____________ tons?
(A) 0.15
(B) 1.5
(C) 4.5
(D) 6.5