A mole of liquid water is vaporized at 100 degree C and 1 atm. Th heat of vaporization is 40.7 kJ/mol. What are the values of Wrev, q, detaU and deta H?

I'm not sure what is the volume because the pressure it not change so I so confort can I use Wrev = -nRT.ln(V2/V1) or Wrev = -nRT.ln(P1/P2)