The heat of formation of CO ( g ) and CO ₂( ~g ) are H=-110 and H=-393 ~kJ ~mol ⁻¹ respectively. What is the heat of reaction ( H) (in kJ mol ⁻¹ ) for the following reaction? CO ( g )+ 1 2 O ₂( ~g ) CO ₂( ~g )

Step-by-step solution

aligned & C + 1 2 O ₂ CO , H=-110 ~kJ ~mol ⁻¹ (i) & C + O ₂ CO ₂, H=-393 ~kJ ~mol ⁻¹ & (ii) aligned On subtracting Eq. (i) from Eq. (ii), we get aligned CO & + 1 2 O ₂ CO ₂ H & =393-(-110) & =-283 ~kJ ~mol ⁻¹ aligned