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Estimate the ΔH°rxn in kilojoules for the formation of methanethiol (CH3SH) from methanol (CH3OH):CH3OH(g) + H2S(g) → CH3SH(g) + H2O(g)

Estimate the ΔH°_rxn in kilojoules for the formation of methanethiol (CH₃SH) from methanol (CH₃OH):
CH₃OH(g) + H₂S(g) → CH₃SH(g) + H₂O(g)