A. increases
B. decreases
C. remains constant
D. first increases and then decreases
E. first decreases and then increases
Related Mcqs:
- In an isothermal process, the internal energy of gas molecules________________?
A. increases
B. decreases
C. remains constant
D. may increase/decrease depending on the properties of gas
E. shows unpredictable behaviour - A gas is compressed in a cylinder by a movable piston to a volume one-half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be___________________?
A. 300 Nm
B. 300,000 Nm
C. 30 Nm
D. 3000 Nm
E. 30,000 Nm - Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant_______________?
A. pressure
B. temperature
C. volume
D. internal energy
E. entropy - For which of the following substances, the internal energy and enthalpy are the functions of temperature only____________________?
A. any gas
B. saturated steam
C. water
D. perfect gas
E. superheated steam - Which law states that the internal energy of a gas is a function of temperature__________________?
A. Charles’ law
B. Joule’s law
C. Regnault’s law
D. Boyle’s law
E. there is no such law - If value of n is infinitely large in a polytropic process pV” = C, then the process is known as constant_____________________?
A. volume
B. pressure
C. temperature
D. enthalpy
E. entropy - Work done in a free expansion process is___________________?
A. + ve
B. -ve
C. zero
D. maximum
E. minimum - The value of n = 1 in the poly tropic process indicates it to be __________________?
A. reversible process
B. isothermal process
C. adiabatic process
D. irreversible process
E. free expansion process - If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called___________________?
A. free expansion
B. hyperbolic expansion
C. adiabatic expansion
D. parabolic expansion
E. throttling - Work done in an adiabatic process between a given pair of end states depends on__________________?
A. the end states only
B. particular adiabatic process
C. the value of index n
D. the value of heattransferred
E. mass of the system
