1)
This reaction is 3*1st reaction
So,
ΔHo rxn = 3* 1st ΔHo rxn
= 3*(80)
= 240 KJ
Answer: 240 KJ
2)
This reaction is -1* 1st reaction
So,
ΔHo rxn = -1* 1st ΔHo rxn
= -1*(80)
= -80 KJ
Answer: -80 KJ
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