1. The problem statement, all variables and given/known data An ideal gas at 25degree celcius and 100kPa is allowed to expand reversibly and isothermally to 5kPa. Calculate.. 1) w per mol (J/mol) 2) q per mol (J/mol) 3) change in molar internal energy U (J/mol) 4) change in molar enthalpy H (J/mol) 2. Relevant equations ΔU = q + w = q - pextΔV ΔH = ΔU +p ΔV = ΔU + ΔngasRT PV=nRT Um(T)=3/2RT 3. The attempt at a solution I absolutely have no idea how to do this question. Any direction would be greatly appreciated.