We can use the following equation to solve for ΔH˚rxn:
Use ΔH˚f from textbook/online
Note that we need to multiply each ΔH˚f by the stoichiometric coefficient since ΔH˚f is in kJ/mol. Also, note that ΔH˚f for elements in their standard state is 0.
Calculate ΔH° for each of the following reactions, which occur in the atmosphere.
(a) O3(g) + NO(g) → NO2(g) + O2(g)
(b) SO3(g) + H2O(l) → H2SO4(aq)
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Enthalpy of Formation concept. You can view video lessons to learn Enthalpy of Formation. Or if you need more Enthalpy of Formation practice, you can also practice Enthalpy of Formation practice problems.