Methane gas ch4 reacts completely with the theoretical

Question

Please compute the accurate answer of the following Problem

Problem- Methane gas (CH₄) reacts completely with the theoretical amount of oxygen (O₂) in a piston-cylinder assembly. Initially, the mixture is at 778F, 1 atm. If the process occurs at constant pressure and the final volume is 1.9 times the initial volume.

Part 1- Determine the work and the heat transfer, each in Btu per lbmol of fuel.

I want help to find the work and the heat transfer.