How much heat is evolved when 12 g of CO...

How much heat is evolved when 12 g of CO reacts with `NO_(2)` ?
This reaction is
`4CO(g)+2NO_(2)(g)to4CO_(2)(g)+N_(2)(g),Delta_(r)H^(0)=-1200kJ`
Write an application of Hess’s law.
Does the following reaction represent a thermochemical equation?
`CH_(4)(g)+2O_(2)(g)toCO_(2)(g)+2H_(2)O(g)Delta,H^(0)=-900kJmol^(-1)`

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