At temperature \(T\), a balloon is partly inflated with an ideal gas to a volume of \(1.0 \mathrm{~L}\). The balloon is then put in a low-pressure container at the same temperature \(T\) and its volume is increased to \(2.0 \mathrm{~L}\). If \(26 \mathrm{~J}\) of work was done by the gas to accomplish this expansion, what is the final pressure inside the balloon in the low-pressure container?