List of top Physics Questions on Thermodynamics

If \( m_a \) and \( m_i \) are the slopes of the adiabatic and isothermal curves for an ideal gas, then \[ \left( \frac{c_p}{c_v} = \gamma \right) \]

Explain the change in internal energy of a thermodynamic system (the gas) by heating it.
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Two thermodynamical processes are shown in the figure. The molar heat capacity for process \( A \) and \( B \) are \( C_A \) and \( C_B \). The molar heat capacity at constant pressure and constant volume are represented by \( C_P \) and \( C_V \), respectively. Choose the correct statement.

One mole of an ideal monatomic gas is taken round the cyclic process \( MNOM \). The work done by the gas 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

On Celsius scale, the temperature of a body increases by \( 40^\circ \text{C} \). The increase in temperature on Fahrenheit scale is:

A gas mixture consists of 8 moles of argon and 6 moles of oxygen at temperature T. Neglecting all vibrational modes, the total internal energy of the system is

Choose the correct statement for processes A & B shown in figure.

The pressure and volume of an ideal gas are related as \( PV^{3/2} = K \) (constant). The work done when the gas is taken from state A (\( P_1, V_1, T_1 \)) to state B (\( P_2, V_2, T_2 \)) is:

A thermodynamic system is taken from an original state A to an intermediate state B by a linear process as shown in the figure. It's volume is then reduced to the original value from B to C by an isobaric process. The total work done by the gas from A to B and B to C would be :

The Pressure (P) versus volume (V) of thermodynamic process shown in figure. The select the correct options (Take γ= 1.1)

2 moles of a monatomic gas requires heat energy \( Q \) to be heated from 30°C to 40°C at constant volume. The heat energy required to raise the temperature of 4 moles of a diatomic gas from 28°C to 33°C at constant volume is:

A block of steel of mass 2 kg slides down a rough inclined plane of inclination of \( \sin^{-1} \left( \frac{3}{5} \right) \) at a constant speed. The temperature of the block as it slides through 80 cm, assuming that the mechanical energy lost is used to increase the temperature of the block is nearly:

Isothermal bulk modulus of a gas at a pressure \( P \) is:

The emissivity of a perfect black body is increased to 16 times by increasing its temperature. If the initial temperature is \( T \), then final temperature of that black body is:

The temperature of the sink of a Carnot's engine is 300 K and the efficiency of the engine is 0.25. If the temperature of the source of the engine is increased by 100 K, the efficiency of the engine increases by

A monatomic gas of volume \( V \) and pressure \( P \) expands isothermally to a volume \( 27V \) and then compressed adiabatically to a volume \( V \). The final pressure of the gas is:

The specific heat capacity of a monatomic gas at constant volume is \( x % \) of its specific heat capacity at constant pressure. Then \( x \) =