Duration: 3:26

4 views

0

Calculate the average bond enthalpyof the \( \mathrm{O}-\mathrm{H} \) bond in water at \( 298 \mathrm{~K} \) usingthe data/information given below :-
\( \mathrm{P} \)
(1) \( \Delta_{f} \mathrm{H}^{0}[\mathrm{H}(\mathrm{g})]=218 \mathrm{~kJ} / \mathrm{mol} \)
W
(2) \( \Delta_{f} \mathrm{H}^{0}[\mathrm{O}(\mathrm{g})]=249.2 \mathrm{~kJ} / \mathrm{mol} \)
(3) \( \Delta_{f} \mathrm{H}^{0}\left[\mathrm{H}_{2} \mathrm{O}(\mathrm{g})\right]=-241.8 \mathrm{~kJ} / \mathrm{mol} \)
The average bond enthalpy of the \( \mathrm{O}-\mathrm{H} \) bond in water is defined as one-half of the enthalpy change for the reaction \( \mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \rightarrow 2 \mathrm{H}(\mathrm{g})+\mathrm{O}(\mathrm{g}) \).
Also, determine the \( \Delta \mathrm{U} \) of the \( \mathrm{O}-\mathrm{H} \) bond in water at \( 298 \mathrm{~K} \). Assume ideal gas behaviour.
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live