In a free expansion process,
A. W1 -W 2 = 0
B. Q1 - Q2 = 0
C. dU = 0
D. all of these
Answer D
The increase in entropy of a system represents
A. increase in availability of energy
B. increase in temperature
C. Decrease in pressure
D. degradation of energy
Otto cycle consists of
A. two constant volume and two isentropic processes
B. two constant pressure and two isentropic processes
C two constant volume and two isothermal processes
D. one constant pressure, one constant volume and two isentropic processes
Answer A
The heat flows from a cold body to a hot body with the aid of an external source. This statement is given by
A. Kelvin
B. Joule
C. Clausis
D. Gay-Lussac
Answer C
The heating of gas at constant volume is governed by
A. Boyle's law
B. Charles' law
C. Gay-Lussac law
D. Avogadro's law
