First Law & Internal Energy: JEE Questions & Solutions

10 mole of oxygen is heated at constant volume from 30 ^ C to 40 ^ C. The change in the internal energy of the gas is cal. (The molecular…

A diatomic gas ( = 1.4) does 100 J of work when it is expanded isobarically. Then the heat given to the gas is J.

The internal energy of a monoatomic gas is 3nRT. One mole of helium... heated slowly by supplying 126 J heat... piston will move cm.

Density of water at 4^ C and 20^ C are 1000 kg/m^3 and 998 kg/m^3 respectively. The increase in internal energy of 4 kg of water when it is…

10 mole of an ideal gas is undergoing the process shown in the figure. The heat involved in the process from P1 to P2 is Joule (P1 = 21.7…

When 300 J of heat is given to an ideal gas with Cp = 72R, its temperature rises from 20^ C to 50^ C keeping its volume constant. The mass…

In the following p –V diagram, the equation of state along the curved path is given by (V-2)^2 = 4ap, where a is a constant. The total work…

A thermodynamic system is taken through the cyclic process ABC as shown in the P - V diagram. The total work done by the system during the…

Given are statements for certain thermodynamic variables: [(A)] Internal energy, volume V, and mass M are extensive variables. [(B)]…

Using the given P-V diagram, the work done by an ideal gas along the path ABCD is:

An ideal gas goes from an initial state to final state. During the process, the pressure of the gas increases linearly with temperature. A.…

The magnitude of heat exchanged by a system for the given cyclic process ABC (as shown in the figure) is (in SI units):

During the melting of a slab of ice at 273 K at atmospheric pressure:

Match List-I with List-II.

An ideal gas has undergone through the cyclic process as shown in the figure. Work done by the gas in the entire cycle is 10^-1 J. (Take =…

A thermodynamic system is taken from an original state A to an intermediate state B by a linear process as shown in the figure. Its volume…

An ideal gas undergoes a cyclic transformation starting from the point A and coming back to the same point by tracing the path A → B → C →…

A real gas within a closed chamber at 27^ C undergoes the cyclic process as shown in the figure. The gas obeys the PV^3 = RT equation for…

A real gas within a closed chamber at 27 C undergoes the cyclic process as shown in the figure. The gas obeys the PV^3 = RT equation for…

1 g of a liquid is converted to vapour at 3 × 10⁵ Pa pressure. If 10% of the heat supplied is used for increasing the volume by 1600 cm³…

Assertion A: If dQ and dW represent the heat supplied to the system and the work done on the system respectively, then according to the…

The pressure of a gas changes linearly with volume from A to B as shown in the figure. If no heat is supplied to or extracted from the gas,…

A source supplies heat to a system at the rate of 1000 W. If the system performs work at a rate of 200 W, the rate at which internal energy…

Given below are two statements: Statement I: If heat is added to a system, its temperature must increase. Statement II: If positive work is…

1 kg of water at 100°C is converted into steam at 100°C by boiling at atmospheric pressure. The volume of water changes from 1.00 10^-3 m^3…

A thermodynamic system is taken through a cyclic process as shown in the P–V diagram. The total work done in the process is