1. The problem statement, all variables and given/known data One mole of ideal gas expands isothermally at 20°C against a constant pressure of 1 atm from 20 to 30L. (1 atm = 1.013 x 105Pa; 1 m3 = 1000L Find q, w, ΔE, and ΔH in Joules 2. Relevant equations ΔE = q + w w = -[itex]\int[/itex]PdV H = E + PV 3. The attempt at a solution I solved for work using the second equation listed above. Since pressure is constant, I removed it from the integral and simply integrated the volume from 20L to 30L. This resulted in -10 atm x L. Converting that to Joules using the conversion factors given, I obtained -1013 J as the thermodynamic work. But then how do I obtain the thermodynamic heat?