Engineering Thermodynamics
Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)

[m R T1/(γ - 1)][1 - (p2, v2 /p1 v1)]
[m R (T1 - T2)] /(γ - 1)
All of these
(p1 v1 - p2, v2)/(γ - 1)

ANSWER DOWNLOAD EXAMIANS APP

Engineering Thermodynamics
Which of the following is the correct statement of the second law of thermodynamics?

All of these
It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source
There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Engineering Thermodynamics