One mole of a mono atomic gas is heated at a constant pressure of 1 atmosphere from 0 K to 100 K. If the gas constant R = 8.32J/mol K, the change in internal energy of the gas is approximately

An ideal gas is taken through the cycle A B C A as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C A is

         

If c_p and c_v denote the specific heat of nitrogen per unit mass at constant pressure and constant volume respectively, then

The efficiency of Carnot engine is 50% and temperature of sink is 500 K. If the temperature of source is kept constant and its efficiency is to be raised to 60%, then the required temperature of the sink will be

The equation of state for 5g of oxygen at a pressure p and temperature T, when occupying a volume V, will be

An ideal gas initially at P₁, V₁ is expanded to P₂, V₂ and then compressed adiabatically to the same volume V₁ and pressure P₃. If W is the net work done by the gas in complete process, which of the following is true ?

An ideal mono atomic gas is taken around the cycle ABCDA as shown in the PV diagram. The work done during the cycle is given by

               

The efficiency of a Carnot engine operating between temperatures of 100^oC and -23^oC will be

5.6 litre of helium gas at STP is adiabatically compressed to 0.7 litre. Taking the initial temperature to be T₁, the work done in the process is

An ideal gas heat engine is operating between 227^oC and 127^oC. It absorbs 10⁴ J of heat at the higher temperature. The amount of heat converted into work is