A gas at $10\,^\circ\text{C}$ occupies a volume of 283 mL. if it is heated to $20\,^\circ\text{C}$ keeping the pressure constant. What is the new volume of gas ?

Calculate the quantity of heat released from system when 2 moles of and ideal gas compressed isothermally from volume $25 \text{ dm}^3$ to $10 \text{ dm}^3$ at constant external pressure 4 bar.

Calculate the standard enthalpy of combustion of carbon monoxide if
$\Delta_f H^\circ (\text{CO}) = -110 \text{ kJ mol}^{-1}$
$\Delta_f H^\circ (\text{CO}_2) = -393 \text{ kJ mol}^{-1}$

Which of the following processes is an endothermic ?