Question #132b8

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Answer 1 · 2016-11-18T00:54:20

Given

#2C(s)+O_2(g)->2CO(g),DeltaH=-221" kJ/mol"#

#=>C(s)+1/2O_2(g)->CO(g),DeltaH=-110.5" kJ/mol"....(1)#

#2CO(g)+O_2(g)->2CO_2(g),DeltaH=-556" kJ/mol"#

#=>CO(g)+1/2O_2(g)->CO_2(g),DeltaH=-228" kJ/mol".... (2)#

Adding (1) and (2) we get

#C(s)+O_2(g)->CO_2(g),DeltaH=-338.5" kJ/mol"#