3. sulfur dioxide (so2) can be reduced by hydrogen disulfide (h2s), producing sulfur in its elemental form and water (h2o). using hess’s law and the reactions below, determine the overall enthalpy for the reaction between so2 and h2s. make to clearly show your work.
h2 (g) + s (s) → h2s (g) δh = –20.6 kj
so2 (g) → s (s) + o2 (g) δh = +296.8 kj
2h2 (g) + o2 (g) → 2h2o (g) δh = –285.8 kj