8. Thermochemistry

Which one of the following reactions would produce the largest amount of heat per mole of oxygen (O_2) consumed?

Given the reaction: 2 H_2S(g) + 3 O_2(g) → 2 SO_2(g) + 2 H_2O(g), what is the standard enthalpy change (ΔH°) for this reaction? (Use the following standard enthalpies of formation: ΔH_f°(H_2S(g)) = -20.6 kJ/mol, ΔH_f°(O_2(g)) = 0 kJ/mol, ΔH_f°(SO_2(g)) = -296.8 kJ/mol, ΔH_f°(H_2O(g)) = -241.8 kJ/mol)

Which of the following best describes the difference between the heat (q) of a reaction and the reaction enthalpy (ΔH_{rxn})?

In a reaction energy diagram, which part of the diagram represents the change in enthalpy (ΔH) for the reaction?

For the reaction 2NO(g) + O2(g) → 2NO2(g), the enthalpy change ΔH is negative and the entropy change ΔS is negative. The forward reaction is thermodynamically favored at which of the following temperatures?

A solid salt dissolves in water according to the following thermochemical equation: NaCl(s) → Na^+(aq) + Cl^-(aq); ΔH = +3.9 kJ/mol. Which statement correctly describes the enthalpy of solution for NaCl(s)?