Consider the chemical equations shown here. 2H2(g) + O2(g) → 2H2O(g) AH, = -483.6 kJ = 2 =-241.8 kJ/mol
302(g) ► 203(g) AH2 = 284.6 kJ = 2 = 142.3 kJ/mol
What is the overall enthalpy of reaction for the equation shown below?
3H2(g) + O2(g) → 3H20 (g)
kJ

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.