Identify the process that proceeds with no heat exchange between the system and the surrounding.

Calculate the work done in the following reaction at $300 \ K$ and at constant pressure. $(R = 8.314 \ J \ K^{-1} \ mol^{-1})$ $4 \ HCl_{(g)} + O_{2_{(g)}} \rightarrow 2 \ Cl_{2_{(g)}} + 2 \ H_2O_{(g)}$ (in $J$)

Two moles of an ideal gas is expanded isothermally from a volume of $300 \ cm^3$ to $2.5 \ dm^3$ at $298 \ K$ against a constant pressure of $1.9 \ bar$. Calculate the work done in joules. (in $J$)

Which of the following statements is true about internal energy?

$10$ moles of an ideal gas confined to a volume of $10 \, L$ is released into the atmosphere at $300 \, K$ where the pressure is $1 \, bar$. The work done by the gas is ....$L \, bar$
$(R = 0.083 \, L \, bar \, K^{-1} \, mol^{-1})$

$2$ moles of an ideal gas expands isothermally from $5$ $dm^3$ to $10$ $dm^3$ at a constant external pressure of $1.5$ bar. Calculate the work done.