Enthalpy $(H)$ is equal to

The magnitude of work done by a gas that undergoes a reversible expansion along the path $ABC$ shown in the figure is .............. $Joule$.

For a cyclic process,what is true?

Out of $E, H, G, q$ and $w$,which are state functions?

Which one of the following reactions has $\Delta H = \Delta U$?

$A$ given mass of gas expands reversibly from the state $A$ to the state $B$ by three paths $1, 2$ and $3$ as shown in the figure. If $w_1, w_2$ and $w_3$ respectively be the work done by the gas along three paths then: