The equation Tds = dE – PdV applies to___________________?
(A) Single phase fluid of varying composition
(B) Single phase fluid of constant composition
(C) Open as well as closed systems
(D) Both
Throttling (Joule-Thomson effect) process is a constant _____________ process?
(A) Enthalpy
(B) Entropy
(C) Pressure
(D) None of these
What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, TR (where, T1 and T2 are source & surrounding temperatures respectively.) ?
(A) TR/(T2 – TR) × (T1 – T2)/T1
(B) TR/(T2 – TR) × T1/(T1 – T2)
(C) TR/(T1 – TR) × (T1 – T2)/T1
(D) None of these
When a gas in a vessel expands, its internal energy decreases. The process involved is________________?
(A) Reversible
(B) Irreversible
(C) Isothermal
(D) Adiabatic
For a single component two phase mixture, the number of independent variable properties are_________________?
(A) Two
(B) One
(C) Zero
(D) Three
Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the__________________?
(A) Calorific value
(B) Heat of reaction
(C) Heat of combustion
(D) Heat of formation
What is the value of ln y (where y = activity co-efficient) for ideal gases ?
(A) Zero
(B) Unity
(C) Infinity
(D) Negative
In the ammonia synthesis reaction, N2 + 3H2 ⇌ 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by___________________?
(A) High temperature
(B) Low pressure
(C) Low temperature only
(D) Both low temperature and high pressure
Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be__________________?
(A) 580
(B) 640
(C) 1160
(D) Data insufficient; can’t be computed
Joule-Thomson co-efficient for a perfect gas is_____________________?
(A) Zero
(B) Positive
(C) Negative
(D) None of these