Formation of NO2F from NO2 and F2 as per the reaction 2NO2(g)+F2(g)→2NO2F(g) is a second order reaction, first order with respect to NO2 and first order with respect to F2. If NO2 and F2 are present in a closed vessel in ratio 2:1 maintained at a constant temperature with an initial total pressure of 3 atm., what will be the total pressure in the vessel after the reaction is complete?