1.

Calculate the heatof combustion of methaneat roomtemperaturefromthe givenbondeneries: C-H=98.7 kcal /mol o=O = 119.1 kcal /mol C=o = 192.0 kcal /mol o-H = 110.6 kcal /mol

Answer»

Solution :`CH_(4)+20_(2)=CO_(2)+2H_(2)O DeltaH=? `
`Delta H=` total bond energiesreactants -Totalbond energies products
`=[4xx(c-H)+2xx(o=o)]-[2xx(C=O)+4(O-H)]`
`=[4xx98.7+2xx119.1-2xx192.0-4xx110.6`
`=-193.4 kcal //MOL]`


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