engineering recuitment UKPSC Polytechnic Lecturer Mock Test 2024 Thermodynamics Ideal and Real Gases
Which one of the following statements is FALSE?
1
For an ideal gas, the enthalpy is independent of pressure.
2
For a real gas going through an adiabatic reversible process, the process equation is given by 𝑃𝑉𝛾 = constant, where P is the pressure, V is the volume and 𝛾 is the ratio of the specific heats of the gas at constant pressure and constant volume.
3
For an ideal gas undergoing a reversible polytropic process 𝑃𝑉1.5 = constant, the equation connecting the pressure, volume and temperature of the gas at any point along the process is \(\rm \frac{P}{R}=\frac{mT}{V}\), where 𝑅 is the gas constant and 𝑚 is the mass of the gas.
4
Any real gas behaves as an ideal gas at sufficiently low pressure or sufficiently high temperature.