Calculate H in kJ for the following reaction C ( g )+ O ₂( ~g ) CO ₂( ~g ) Given that, gathered H ₂ O (g)+ C (g) CO (g)+ H ₂(g) ; H=+131 ~kJ CO (g)+ 1 2 O ₂(g) CO ₂(g) ; H=-282 ~kJ H ₂(g)+ 1 2 O ₂(g) H ₂ O (g) ; H=-242 ~kJ gathered

Step-by-step solution

Given, aligned & H ₂ O ( g )+ C ( g ) CO ( g )+ H ₂(g) ; & H=131 ~kJ & CO (g)+ 1 2 O ₂(g) CO ₂(g) ; & H=-282 ~kJ & H ₂( ~g )+ 1 2 O ₂( ~g ) H ₂ O ( g ) ; & H=-242 ~kJ & C ( g )+ O ₂( ~g ) CO ₂( ~g ) ; H = ? & aligned On adding Eqs (i), (ii) and (iii), we get Eq (iv) aligned & H ₂ O ( g )+ C ( g ) CO (g)+ H ₂(g) ; & H=+131 ~kJ & CO ( g )+ 1 2 O ₂( ~g ) CO ₂(g) & H=-282 ~kJ & H ₂(g)+ 1 2 O ₂(g) H ₂ O (g) ; & H=-242 ~kJ & C ( g )+ O ₂( ~g ) CO ₂( ~g ) & H=(131-282-242) kJ & =-393 ~kJ & aligned