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| 1. |
The standard heat of combustion of carbon is –94.0 kcal hence, the heat of formation of CO2 will be : (a) –46.0 kcals (b) –26.0 kcals (c) –94.0 kcals (d) +94.0 kcals |
| Answer» <p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (c) –94.0 kcals </strong></span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">Given C + O<sub>2</sub> → CO<sub>2 </sub></span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">ΔH = −94.0 kcals </span></span></p><p style="text-align:justify"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">The equation represents heat of combustion of carbon as well as heat of formation of CO<sub>2</sub>.</span></span></p> | |