There is not much information given so I would have to make certain assumptions. Here are the following:
1. the gas is ideal
2. The gas is in its standard pressure and specific volume. (1atm and 22.4L/mol)
3. There is no initial temperature hence the pressure given the assumptions above is the "new" pressure.
PV=nRT
P= (0.0821L.atm/mol K)(235)/(22.4L/mol)
P=0.861 atm (below atmospheric pressure)
