Exercise (Conceptual Questions)

When an ideal diatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas is.

Specific heat of a gas undergoing adiabatic change is $\_\_\_\_\_\_\_\_$

"Heat cannot flow by itself from body at lower temperature to a body at higher temperature" is a statement or consequence of

A Carnot engine whose efficiency is $40\%$ takes in heat from a source maintained at a temperature of $500 \mathrm{K}$. It is desired to have an engine of efficiency $60\%$. Then the intake temperature for the same exhaust (sink) temperature must be,

A carnot engine working between 300 K and 600 K has work out put of 800 J per cycle. The amount of heat energy supplied to the engine from source per cycle will be :

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

A refrigerator works between temperature –10ºC and 27ºC, the coefficient of performance is:

If there was no atmosphere, the average temperature on earth's surface would be,