List of top Physics Questions on Thermodynamics asked in MHT CET

A gas having \(\gamma = \frac{5}{2}\) and volume 360 cc is suddenly compressed to 90 cc. If the initial pressure of the gas is \(P\), find the final pressure.
Find the heat energy that must be supplied to 14 g of nitrogen at room temperature to raise its temperature by \(48^\circ\text{C}\) at constant pressure. (Molecular weight of nitrogen = 28; \(R\) is the gas constant; \(C_p = \frac{7}{2}R\) for a diatomic gas.)
A monoatomic ideal gas is heated at constant pressure. The percentage of total heat used in increasing the internal energy and that used for doing external work is $A$ and $B$ respectively. Then the ratio, $\text{A} : \text{B}$ is
When an ideal gas $(\gamma = \frac{5}{3})$ is heated under constant pressure, then what percentage of given heat energy will be utilised in doing external work?
A monoatomic ideal gas is heated at constant pressure. The percentage of total heat used in increasing the internal energy and that used for doing external work is $A$ and $B$ respectively. Then the ratio, $\text{A} : \text{B}$ is
In thermodynamic process, which of the following statements is not true?
Which one of the following statements is wrong for an isobaric process?
An ideal gas at pressure 'p' is adiabatically compressed so that its density becomes twice that of the initial. If $\gamma = \frac{c_p}{c_v} = \frac{7}{5}$, then final pressure of the gas is
The initial pressure and volume of a gas is 'P' and 'V' respectively. First by isothermal process gas is expanded to volume '9V' and then by adiabatic process its volume is compressed to 'V' then its final pressure is (Ratio of specific heat at constant pressure to constant volume = $\frac{3}{2}$)
An ideal gas with pressure $P$, volume $V$ and temperature $T$ is expanded isothermally to a volume $2V$ and a final pressure $P_i$. The same gas is expanded adiabatically to a volume $2V$, the final pressure is $P_a$. In terms of the ratio of the two specific heats for the gas $\gamma$, the ratio $\frac{P_i}{P_a}$ is
A monoatomic ideal gas initially at temperature $T_1$ is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a temperature $T_2$ by releasing the piston suddenly. $L_1$ and $L_2$ are the lengths of the gas columns before and after the expansion respectively. Then $\frac{T_2}{T_1}$ is
For a monoatomic gas, the work done at constant pressure is $W$. The heat supplied at constant volume for the same rise in temperature of the gas is
A monoatomic gas at pressure ‘P’ having volume ‘V’ expands isothermally to a volume 2 V and then adiabatically to a volume 16 V. The final pressure of the gas is \(\gamma = \frac{5}{3}\)
A monoatomic gas is suddenly compressed to (1/8)th of its initial volume adiabatically. The ratio of the final pressure to the initial pressure is
The relation obeyed by a perfect gas during an adiabatic process is $PV^{3/2} = \text{constant}$. The initial temperature of the gas is $T$. When the gas is compressed to half of its initial volume, the final temperature of the gas is
One mole of an ideal gas expands adiabatically at constant pressure such that its temperature $T \propto \frac{1}{\sqrt{V}}$. The value of $\gamma$ for the gas is $\left( \gamma = \frac{C_p}{C_v}, V = \text{Volume of the gas} \right)$
Which one of the following equations specifies an isobaric process? \([Q = \text{heat supplied}, \Delta P, \Delta V \text{ and } \Delta T \text{ are change in pressure, volume and temperature respectively}]\)
A monoatomic gas at pressure ‘P’ having volume ‘V’ expands isothermally to a volume 2 V and then adiabatically to a volume 16 V. The final pressure of the gas is \(\gamma = \frac{5}{3}\)
In thermodynamic process, which of the following statements is not true?