Specific heats of Nitrogen at constant pressure and at constant volume are 0.216 and 0.175 cal/mol/K respectively.Given `R = 8.31` J/mol K. Calculate the mechanical equivalent of heat.

The rate constants ofa reaction at 500 K and 700 K are 0.025 sec^-1 and 0.075 sec^-1 respectively. Calculate the energy ofactivation of the reaction. ( R=8.314JK^-1 and log 3 = 0.447)

Latent heat of fusion of ice is 1436.3 cal mol^(-1) . Calculate the molal depression constant of water.

When the tempeature of 10 g of an enclosed gas is raised by 50^@C , the gas expands by 2.5 litres against normal atmospheric pressure. The sp. ht. at constant volume for the gas is 0.8 kcal//kg//K . Calculate the heat supplied. J =4200 J//k cal.

In an experiment for finding the co-efficient of expansion of air at constant pressure the volume of air at 30^@C . Was 75cc. When the air was heated to 98^@C , keeping the pressure constant, it occupied 92 cc . Calculate the co-efficient of expansion of air.