Consider these equations: 2S (s) + 3O2 (g)→2SO3 (g), ΔH = −792
kJ 2S (s) + 2O2 (g)→2SO2 (g), ΔH =?
2SO2 (g) + O2 (g)→2SO3 (g), ΔH = −198 kJ
What is the missing ΔH?
−594 kJ
−198 kJ
+198 kJ
+792 kJ

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sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: