A thermodynamic system is taken through the cycle $PQRSP$ process. The net work done by the system is  .... $J$

A cyclic process $ABCD$ is shown in the given $P-V$ diagram. In the following answer, the one that represents the same process as in $P-T$ diagram is

Which of the following is correct in terms of increasing work done for the same initial and final state

Two rigid boxes containing different ideal gases are placed on a table. Box $A$ contains one mole of nitrogen at temperature $T_0$ , while box $B$ contains one mole of helium at temperature $(7/3)\, T_0$ . The boxes are then put into thermal contact with each other, and heat flows between them until the gases reach a common final temperature (ignore the heat capacity of boxes), then the final temperature of gases $T_f$ , in terms of $T_0$ is

An ideal gas undergoes a thermodynamics cycle as shown in figure. Which of the following graphs represents the same cycle?

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