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need to figure out how to calculate.

the value of DeltaH for the reaction below is -72kj_____kj of heat are released when 1.0 mole of HBr is formed in this reaction.

H2(g)*Br2(g)> 2HBr(g)

I know the answer is 36 but need help

1 answer

The reaction as written produces 72 kJ heat and that's for 2 moles HBr. The question is for 1 mole which of course is just half that.
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