Home
MCQ QUIZ APP DOWNLOAD

What is the correct answer?

4

When a gas in a vessel expands, its internal energy decreases. The process involved is

A. Reversible

B. Irreversible

C. Isothermal

D. Adiabatic

Correct Answer :

A. Reversible


Related Questions

The change in __________ is equal to the reversible work for compression… In the reaction, represented by, 2SO2 + O2 2SO3; ΔH = - 42 kcal;… What is the value of maximum COP in case of absorption refrigeration,… The second law of thermodynamics states that Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole. The efficiency of a Carnot heat engine operating between absolute temperatures… Entropy of the system decreases, when Internal energy is equal to the heat absorbed in case of a/an __________… Gibbs phase rule finds application, when heat transfer occurs by At the critical point of a substance What is the degree of freedom for a system comprising liquid water equilibrium… During adiabatic expansion of gas The main feature of Carnot refrigeration cycle is that, it The temperature at the eutectic point of the system is the __________… Work done in an adiabatic process between two states depends on the Vapour which is at a pressure smaller than the saturation pressure for… Sublimation temperature of dry ice (solid CO2) is __________ °C. Heat of formation of an element in its standard state is (∂E/∂T)V is the mathematical expression for Pick out the wrong statement Which of the following is an extensive property of a system? The enthalpy change when ammonia gas is dissolved in water is called the… Specific volume of an ideal gas is If the pressure on 100 c.c. of air is halved, then its volume (at the… The unit of fugacity is the same as that of the The necessary condition for phase equilibrium in a multiphase system of… Pick out the correct equation relating 'F' and 'A'. Kopp's rule is used to calculate the heat capacity of Domestic refrigerator usually works on the __________ refrigeration cycle. Which of the following units is not present in both the vapor compression…