The molar specific heat at constant pressure of an ideal gas is (⁷/2)R. The ratio of specific heat at constant pressure to that at constant volume is

A thermodynamic system is taken through the cycle PQRSP process. The net work done by the system is :

                  

A gas at state A changes to state B through path I and II shown in figure. The changes in internal energy are ΔU₁ and ΔU₂ respectively. Then

An ideal monoatomic gas is taken round the cycle ABCDA as shown in the P-V diagram.

              

Universal gas constant is:

Initial pressure and volume of a gas are P and V respectively. First the gas is expanded isothermally to 4V and then its volume is made V by adiabatic process. Its final pressure (γ  = 1.5) is:

One mole of a monoatomic 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 :

A Carnot engine operating between temperatures T₁ and T₂ has efficiency 1/6. When T₂ is lowered by 62 K, its efficiency increases to 1/3. Then T₁ and T₂ are, respectivley :

Let 110 J of heat is added to a gaseous system, whose internal energy is 40 J, then the amount of external work done is:

A system goes from A to B via two processes I and II as shown in the figure. If ΔU₁ and ΔU₂are the changes in internal energies in the processes I and II respectively, then