1.If R = universal gas constant, then the amount of heat needed to raise the temperature of 2 mol of an ideal monoatomic gas from 273 K to 373 K when no work is done, is

2.The thermo e. m. fs. generated in a thermocouple thermometer are 3 m V at the triple point temperature of water and 4.5 m V when the junction is kept in a hot liquid. The temperature of the liquid is

3.If the amount of heat given to a system be 35 J and the amount of work done by the system be - 15 J, then the change in the internal energy of the system is

4.Only a very small fraction of the energy supplied to a domestic light bulb is emitted as light. This is because

5.During the adiabatic expansion of 2 mol of a gas, the internal energy of the gas is found to decrease by 2 J. The work done during the process on the gas will be equal to