7. Consider the following balanced thermochemical equationfor a reaction sometimes use for H2S production: %S8(s) + H2(g) → H2S(g) AHrxn = -20.2 kJ (a) Is this an exothermic or endothermic reaction? (b) What is AHrxn for the reverse reaction? (c) What is AH when 3.2 mol of Sa reacts? (d) What is AH when 20.0 g of S8 reacts?

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