Remarkably, a catalytic system that uses light energy to hydrolyze water into hydrogen H₂(g) and O(g) has been devised (Science 334, 2011: 645-648) to capture and efficiently store solar energy. Hydrogen is "clean burning" in that it yields only H₂O . In this problem you will contrast the combustion of 1 kgH₂(g) to that of 1 kg of n -octane.
Calculate the enthalpy change on burning 1 kg of H₂(g) to H₂O(l) at 25°C and 1 bar