Entropy change of the reaction, H2O (liquid) → H2O (gas), is termed as the enthalpy of___________________?
(A) Solution
(B) Vaporisation
(C) Formation
(D) Sublimation
The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is__________________?
(A) Less pronounced
(B) More pronounced
(C) Equal
(D) Data insufficient, can’t be predicted
What happens in a reversible adiabatic expansion process ?
(A) Heating takes place
(B) Cooling takes place
(C) Pressure is constant
(D) Temperature is constant
Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a __________________?
(A) Straight line
(B) Sine curve
(C) Parabola
(D) Hyperbola
If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will___________________?
(A) Increase
(B) Decrease
(C) Remain unaltered
(D) Increase or decrease; depends on the particular reaction
After throttling, gas temperature___________________?
(A) Decreases
(B) Increases
(C) Remain same
(D) May increase or decrease; depends on the nature of the gas
Co-efficient of performance for a reversed Carnot cycle working between temperatures T1 and T2 (T1 > T2) is ___________________?
(A) T2/(T1 – T2)
(B) T1/(T1 – T2)
(C) (T1 – T2)/T1
(D) (T1 – T2)/T2
Work done is a____________________?
(A) Property of the system
(B) Path function
(C) Point function
(D) State description of a system
For a constant pressure reversible process, the enthalpy change (ΔH) of the system is___________________?
(A) Cv.dT
(B) Cp.dT
(C) ∫ Cp.dT
(D) ∫ Cv.dT