In the  diagram,  is the initial state and  is the final state. The gas goes from I ot  by (i) IAF, (ii) IBF, (iii) ICF. The heat absorbed by the gas is 

A closed system undergoes a process  for which the values  and  are  and  respectively. If the system is returned to state 1 and  is  the work done  is          

Heat energy absorbed by a system in going through a cyclic process shown in the given figure is

In a thermodynamic process, pressure of a fixed mass of gas is changed in such a manner that the gas molecules gives out 30 joules of heat and  of work is done on the gas. If the initial internal energy of the gas was , then final internal energy will be   

Unit mass of a liquid with volume  is completely changed into a gas of volume  at a constant external pressure  and temperature . If the latent heat of evaporation for the given mass is , then the increase in the internal energy of the system is

A gas can be taken from  to  via two different processes  and .

When path ACB is used  of heat flows into the system and  of work is done by the system. If path  is used work done by the system is . The heat Flow into the system in path  is :  

of water at a pressure of  is converted into steam without any change of temperature. The volume of  of steam is  and the latent heat of evaporation is . The change in internal energy due to evaporation of  of water is

When the state of a gas adiabatically changed from an equilibrium state  to another equilibrium state  an amount of work done on the stystem is . If the gas is taken from state A to B via process in which the net heat absorbed by the system is , then the net work done by the system is   

A sample of an ideal gas is taken through the cyclic process  P as shown in figure. It absorbs,  of heat during the part , no heat during  and rejects  of heat during . A work  is done on the gas during the part . The internal energy of the gas at  is . The work done by the gas during the part  is: