ThermodynamicsNEET Physics · Class 11 · NCERT Chapter 11

A gas is heated and absorbs $300\text{J}$ of heat. It does $100\text{J}$ of work on the surroundings. The change in internal energy is:

In an isothermal expansion of an ideal gas:

A gas is compressed adiabatically and $200\text{J}$ of work is done on the gas. The change in internal energy is:

The first law of thermodynamics is essentially a statement of:

A system absorbs $100\text{J}$ of heat and the internal energy increases by $80\text{J}$. The work done by the system is:

The work done by an ideal gas during isothermal expansion from $V_1$ to $V_2$ at temperature $T$ is:

One mole of an ideal gas at $300\text{K}$ expands isothermally to twice its initial volume. The heat absorbed is approximately ($R=8.314\text{J/(mol⋅K)}$, $\ln 2=0.693$):

In an isothermal process, which of the following is true for an ideal gas?

An ideal gas is compressed isothermally to half its volume. The work done by the gas is:

For an adiabatic process of an ideal gas, which relation is correct?

A monoatomic gas (γ = 5/3) at $300\text{K}$ is compressed adiabatically from $V$ to $V/8$. The final temperature is:

In an adiabatic process for an ideal gas, the slope of the PV curve compared to that of an isothermal curve at the same point is:

In a sudden (adiabatic) compression of an ideal gas, the temperature:

A diatomic gas (γ = 7/5) is expanded adiabatically from $P_1=32\text{atm}$, $V_1=1\text{L}$ to $V_2=32\text{L}$. The final pressure is:

The molar specific heats of an ideal gas at constant pressure and constant volume satisfy:

The value of γ = $C_P/C_V$ for a monoatomic ideal gas is:

For a diatomic ideal gas at room temperature, $C_V$ in terms of $R$ is:

The ratio $C_P/C_V$ in terms of degrees of freedom $f$ is:

A gas at constant pressure $P=2\times 10^5\text{Pa}$ expands from $V_1=1\text{L}$ to $V_2=3\text{L}$. The work done is:

In a PV diagram, the work done by a gas equals:

A gas undergoes the path A → B on a PV diagram. The work done by the gas:

In a complete cyclic process, the change in internal energy of the working substance is:

A gas undergoes a clockwise cyclic process on a PV diagram enclosing area $200\text{J}$. The net heat absorbed by the gas in one cycle is:

A counter-clockwise cycle on a PV diagram represents:

A Carnot engine operates between $400\text{K}$ and $300\text{K}$. Its efficiency is:

A Carnot engine has $\eta =40\%$ when operating between $T_h$ and $300\text{K}$. The hot reservoir temperature is:

A Carnot engine absorbs $1000\text{J}$ from a $500\text{K}$ reservoir and rejects $600\text{J}$ to the cold reservoir. The temperature of the cold reservoir is:

Which of the following is impossible according to the second law of thermodynamics?

A Carnot refrigerator operates between $300\text{K}$ and $260\text{K}$. Its coefficient of performance is:

The COP of a refrigerator is $5$. If $50\text{J}$ of work is supplied per cycle, the heat removed from the cold space is:

A heat pump uses $400\text{J}$ of electrical work per cycle and delivers $1200\text{J}$ of heat to a room. Its COP as a heat pump is:

Which statement is the Clausius form of the second law?