A cylindrical vessel \(1 \mathrm{~m}\) long and \(0.1 \mathrm{~m}\) in diameter is filled with a monatomic gas at \(P=1\) atm and \(T=300 \mathrm{~K}\). The gas is heated by an electrical discharge, along the axis of the vessel, which releases an energy of \(10^{4}\) joules. What will the temperature of the gas be immediately after the discharge?