Calculate the standard enthalpy change (in {kJ} {mol}^{-1} ) for the reaction {H}_{2}(g)+ {O}_{2}(g) \rightarrow {H}_{2} {O}_{2}(g) Given that bond enthalpies of H - H, O = O, O - H and O - O (in {kJ} {mol}^{-1} ) are respectively 438,498,464 and 138

KEAM 2010 Physics and Chemistry Paper

Question : 105 of 119

Marks: +1, -0

Calculate the standard enthalpy change (in kJmol−1 ) for the reaction H2(g)+O2(g)⟶H2O2(g)
Given that bond enthalpies of H - H, O = O, O - H and O - O (in kJmol−1 ) are respectively 438,498,464 and 138

-130
-65
+130
-334
+334

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