List of top Physics Questions on Thermodynamics asked in KCET

The ratio of molar specific heats of oxygen is
A solid cube of mass \( m \) at a temperature \( \theta_0 \) is heated at a constant rate. It becomes liquid at temperature \( \theta_1 \), and vapor at temperature \( \theta_2 \). Let \( s_1 \) and \( s_2 \) be specific heats in its solid and liquid states respectively. If \( L \) and \( L_v \) are latent heats of fusion and vaporization respectively, then the minimum heat energy supplied to the cube until it vaporises is
One mole of an ideal monatomic gas is taken round the cyclic process \( MNOM \). The work done by the gas is
ideal monatomic gas
The speed of sound in an ideal gas at a given temperature T is v. The rms speed of gas molecules at that temperature is vrms. The ratio of the velocities v and vrms for helium and oxygen gases are X and X' respectively. Then \(\frac{X}{X'}\) is equal to
100 g of ice at 0 °C is mixed with 100 g of water at 100 °C. The final temperature of the mixture is
[Take Lf= 3.36 × 105 J kg-1 and Sw = 4.2 × 103 J kg-1 k-1]

"Heat cannot itself flow from a body at lower temperature to a body at higher temperature ". This statement corresponds to

A gas mixture contains monoatomic and diatomic molecules of 2 moles each. The mixture has a total internal energy of (symbols have usual meanings)
A thermodynamic system undergoes a cyclic process ABC as shown in the diagram. The work done by the system per cycle is

For which combination of working temperatures, the efficiency of Carnot's engine is the least ?

A Carnot engine working between $300\, K$ and $400\, K$ has $800\, J$ of useful work. The amount of heat energy supplied to the engine from the source is
A gas under constant pressure of $ 45 \times 10^5\, p_a $ when subjected to $ 800 \,k j $ of heat, changes the volume from $ 0.5\, m^3 $ to $ 2.0\, m^3 $ . The change in internal energy of the gas is
The efficiency of a Carnot engine which operates between the two temperature $T_1 = 500\, K$ and $T_2 = 300\, K$ is
A cycle tyre bursts suddenly. What is the type of this process
A graph of pressure versus volume for an ideal gas for different processes is as shown. In the graph curve $OC$ represents
A sample of ideal monoatomic gas is taken around the cycle ABC A as shown in figure. The work done during cycle is
A Carnot's engine is made to work between $200^\circ \,C$ and $0^\circ \,C$ first and then between $0^\circ \,C$ and $-200^\circ \,C$. The ratio of efficiencies of the engine is the two cases is
During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio $C_p / C_v$ for the gas is
One mole of an ideal gas undergoes a cyclic change ABCD. From the given diagram calculate the net work done in the process. (1 atm = $10^6\,dyne\,cm^{-2}$) is
A thermos flask contains hot coffee. The flask is vigorously shaken. Then the temperature of the coffee will