InterviewSolution
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InterviewSolution
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The average O-H bond energy in `H_(2)O` with the help of following data. (1) `H_(2)O(l)rarrH_(2)O(g), Delta H= +40.6 kJ mol^(-1)` (2) `2H(g)rarrH_(2)(g), DeltaH= -435.kJ mol^(-1)` (3) `O_(2)(g)rarr2O(g), Delta H= +489.6 kJ mol^(-1)` (4) `2H_(2)(g)+O_(2)(g)rarr2H_(2)O(l), Delta H= -571.6 kJ mol^(-1)`A. `584.9 kJ mol^(-1)`B. `279.8 kJ mol^(-1)`C. `462.5 kJ mol^(-1)`D. `925 kJ mol^(-1)` |
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Answer» Correct Answer - C Assuming density of solution is `1g//c c` and specific heat is `4.2 J//gc` `=msDelta T=100xx4.2xx3` millimoles of acid neutralized `=5` `DeltaH= - 100xx4.2xx3xx(1000)/(5)= -2.52xx10^(2)KJ//"mole"`. |
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