Thermodynamics ...

In adiabatic expansion of a gas

For adiabatic process, wrong statement is

$$1cm^{3}$$  of water at its boiling point absorbs 540 calories of heat to become steam with a volume of 167$$1cm^{3}$$. If the atmospheric pressure = $$1.013\times 10^{5}N/m^{2}$$  and the mechanical equivalent of heat = 4.19 J / calorie, the energy spent in this process in overcoming intermolecular forces is

We consider a thermodynamic system. If $$\bigtriangleup U$$ represents the increase in its internal energy and W the work done by the system. Which of the following statments is true

A Carton's engine is made to work between $$200^{\circ}C$$ and $$0^{\circ}C$$ first and then between $$0^{\circ}$$C and $$200^{\circ}$$C. The ratio of efficiency of the engine in the two cases is

A gas is suddenly compressed to 1/4 th of it volume at normal temperature. The increase in its temperature is $$(\gamma  = 1.5)$$

A gas for which $$\gamma = 1.5$$ is suddenly compressed to $$\dfrac{1}{4}$$ th of the initial volume. Then the ratio of the final to the initial pressure is 

An ideal heat engine working between temperature T and T has an efficiency $$\eta $$, the new efficiency if both the source and sink temperature are doubled, will be

A scientist that the efficiency of his heat engine which operates at source temperature $$127^{\circ}C$$ and sink temperature $$27^{\circ}C$$  is  26% then 

The volume of a gas reduced adiabatically to $$\dfrac{1}{4}$$ of its volume at $$27^{o} C$$, if the value of $$\gamma = 1.4$$, then new temperature will be