5 m³ of gas at 8 bar and \(180^{\circ} \mathrm{C}\) is heated keeping the pressure same throughout till the volume is doubled. Find the heat added, external work done and the change in internal energy during the process. Take \(c_{p}=1.005 \mathrm{~kJ} / \mathrm{kg} . K, c_{v}=0.718 \mathrm{~kJ} / \mathrm{kg}\). \(K\).