The following gas-phase reaction takes place in a closed, constant-volume batch reactor at isothermal (constant temperature) conditions. 2CO+O2→2CO2 Initially, the reactor contains 0.949 kmol of CO, 1...

The following gas-phase reaction takes place in a closed, constant-volume batch reactor at isothermal (constant temperature) conditions.

2CO+O2→2CO2

Initially, the reactor contains 0.949 kmol of CO, 1 kmol of O2, 1 kmol of CO2, and 0.5 kmol of N2 at a total pressure of 5 atm. Assuming ideal gas behavior, what is the reactor pressure (in atm) when the reaction goes to completion?

Is it 4.31 (N2 included in final moles) or 3.59 (N2 not included in final moles)