3. Sulfur dioxide (SO2) can be reduced by hydrogen disulfide (H2S), producing sulfur in its elemental form and water (H2O). Usin

Question

2 years ago

10

3. Sulfur dioxide (SO2) can be reduced by hydrogen disulfide (H2S), producing sulfur in its elemental form and water (H2O). Usin

g 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

Chemistry

1 answer:

Dafna1 [17] · Answer 1 · 2022-08-21T02:02:34+03:00

The reaction between h2s and so2 results to h20 and elemental sulfur. The final reaction is SO2 +2H2S = 3S+ 2H2O. Using Hess law, the first equation is reversed and multiplied by 2, the second and the third equation remains the same. Calculating the overall enthalpy, the answer is 52.2 kJ.