Chapter 8.6, Problem 8.8P

The reaction between hydrogen and oxygen to yield water vapor has ΔH° = −484 kJ. How much PV work is done, and what is the value of ΔE in kilojoules for the reaction of 0.50 mol of H₂ with 0.25 mol of O₂ at atmospheric pressure if the volume change is −5.6 L?

$2{\text{H}}_2(g)+{\text{O}}_2(g)\stackrel{}{\to }2{\text{H}}_2\text{O}(g)\Delta H°=-484\text{kJ}$