The $P-V$ diagram for an ideal gas in a piston cylinder assembly undergoing a thermodynamic process is shown in the figure. The process is

A cyclic process for $1\, mole$ of an ideal gas is shown in figure in the $V-T,$ diagram. The work done in $AB, BC$ and $CA$ respectively

In a thermodynamic process pressure of a fixed mass of a gas is changed in such a manner that the gas releases $30$ joules of heat and $10$ joules of work was done on the gas. If the initial internal energy of the gas was $30$ joules, then the final internal energy will be …….. $J$

$1c{m^3}$ of water at its boiling point absorbs $540$ calories of heat to become steam with a volume of $1671c{m^3}$.If the atmospheric pressure = $1.013 \times {10^5}N/{m^2}$ and the mechanical equivalent of heat = $4.19J/calorie$, the energy spent in this process in overcoming intermolecular forces is ….. $cal$

What is the nature of change in internal energy in the following three thermodynamical processes shown in figure