Thermodynamics ...

First law of thermodynamics is based on

1 cm³ of water at its boiling point absorbs 540 cal of heat to become steam with a volume of 1671 cm³. If the atmospheric pressure =1.013 × 10⁵ Nm^-2 and the mechanical equivalent of heat = 419 J cal^-1, the energy spent in this process in overcoming intermolecular forces is

Two cylinders A and B fitted with pistons, contain equal number of moles of an ideal monoatomic gas at 400 K. The piston of A is free to move while that of B is held fixed. Same amount of heat energy is given to the gas in each cylinder. If the rise in temperature of the gas in A is 42 K, the rise in temperature of the gas in B is (γ = 5 /3)

If 150 J of heat is added to a system and the work done by the system is 110 J, then change in internal energy will be

From the following statements concerning ideal gas at any given temperature T, select the correct one(s)

An ideal gas is taken from point A to the point B as shown in the p – V diagram keeping the temperature constant. The work done in the process is

A perfect gas goes from a state A to another state B by absorbing 8 × 10⁵ J of heat and doing 6.5 × 10⁵ J of external work.
It is now transferred between the same two states in another process in which it absorbs 10⁵ J of heat in the second process. Then,

The ratio of specific heats of a gas is γ. The change in internal energy of one mole of the gas, when the volume changes from V to 2V at constant pressure p is