Evaporation of water is

Assume each reaction is carried out in an open container. For which reaction will $\Delta H = \Delta E$ ?

The heat of combustion of benzene determined in a bomb calorimeter is $-870 \ kcal \ mol^{-1}$ at $25 \ ^oC$. The value of $\Delta E$ for the reaction is......$kcal$.

Identify the intensive quantity from the following.

Two moles of an ideal gas expand spontaneously into a vacuum. The work done is ............. $Joule$.

When the temperature of $2$ moles of an ideal gas is increased by $20^{\circ} C$ at constant pressure,find the work involved in the process. (in $R$)