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InterviewSolution
| 1. |
The value of ΔHO—H is 109 kcal mol−1 . Then formation of one mole of water in gaseous state from H (g) and O (g) is accompained by : (a) absorption of 218 kcal of energy (b) release of 218 kcal of energy (c) release of 109 kcal of energy (d) unpredictable |
| Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Correct option (b) release of 218 kcal of energy</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">In water 2(O—H) bonds are formed. </span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">So the value of ΔH for the formation of one mole of water in gaseous state is </span></span></p><p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif">ΔH = −2 × 109 = −218 kcal</span></span></p> | |