Two moles of CO and one mole of O2 are taken in a container of volume one litre to form two moles of — AITS & Test Series Chemistry Question

Question

Two moles of CO and one mole of O2 are taken in a container of volume one litre to form two moles of CO2 according to equation:    2 2 2CO g O g 2CO g ; H 560 kJ     The pressure in the vessel changes from 70 atm to 40 atm. If the gases deviate appreciably from ideal nature (1.0 L atm = 0.1 kJ), then (A) U = 555.895 kJ (B) U = 518.95 kJ (C) U = 557 kJ (D) U = +518.95 kJ