What is the standard enthalpy change (ΔH) for the reaction: 2H2 (g) + O2 (g) → 2H2O (l)?
Correct: A
The standard enthalpy change for the reaction 2H2 (g) + O2 (g) → 2H2O (l) can be calculated using the standard enthalpies of formation of the reactants and products. The standard enthalpy of formation of H2O is -285.83 kJ/mol. For two moles of H2O, the total enthalpy change is 2 * -285.83 kJ/mol = -571.66 kJ/mol, which is closest to -572 kJ/mol among the given choices.