If for hydrogen ${\mathrm{C}}_{\mathrm{p}}-{\mathrm{C}}_{\mathrm{v}} = \mathrm{m} \mathrm{and}$ for nitrogen ${\mathrm{C}}_{\mathrm{p}}-{\mathrm{C}}_{\mathrm{v}} = \mathrm{n}, \mathrm{where} {\mathrm{C}}_{\mathrm{p}} \mathrm{and} {\mathrm{C}}_{\mathrm{v}}$ refer to specific heats per unit mass respectively at constant pressure and constant volume, the relation between m and n is: (Molecular weight of hydrogen = 2 and molecular weight of nitrogen = 14)