An exothermic reaction is one in which the reacting substances

Which of the following is an extensive property of a system?

One mole of an ideal gas at $25\,^{\circ}C$ expands its volume from $1\,L$ to $4\,L$ at constant temperature. What work (in $J$) is done if the gas expands against a vacuum $(P_{ext} = 0)$?

Heat exchanged in a chemical reaction at constant temperature and constant pressure is called as

The volume of $100 \ L$ of gas increases to $120 \ L$ at a constant temperature and an external pressure of $10 \ bar$. Calculate the work done by the system. [Given: $1 \ L \ bar = 24.21 \ cal$] (in $cal$)

The work done during the expansion of $1 \ mol$ of an ideal gas into a vacuum is ............ .