Change in enthalpy for reaction `2H_(2)O_(2)(l)rarr2H_(2)O(l)+O_(2)(g)` if heat of formation of `H_(2)O_(2)(l)` and `H_(2)O(l)` are `-188` and `-286KJ//mol` respectively isA. `-196` KJ/molB. `+196` KJ/molC. `+948` KJ/molD. `-948` KJ/mol

Change in enthalpy for reaction `2H_(2)O_(2)(l)rarr2H_(2)O(l)+O_(2)(g)

1.	Change in enthalpy for reaction `2H_(2)O_(2)(l)rarr2H_(2)O(l)+O_(2)(g)` if heat of formation of `H_(2)O_(2)(l)` and `H_(2)O(l)` are `-188` and `-286KJ//mol` respectively isA. `-196` KJ/molB. `+196` KJ/molC. `+948` KJ/molD. `-948` KJ/mol
Answer» Correct Answer - A `2H_(2)O_(2)(l) to 2H_(2)O(l) + O_(2)(g) DeltaH=?` `DeltaH=[(2xxDeltaH_(f) " of " H_(2)O(l) )+ (DeltaH_(f) " of " O_(2)(g)]-(2xxDeltaH_(f) " of " H_(2)O_(2)(l))]` `=[(12xx-286)+ (0) -(2xx-188)]` `[-572 + 376 ]=-196` KJ/mol

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Change in enthalpy for reaction `2H_(2)O_(2)(l)rarr2H_(2)O(l)+O_(2)(g)` if heat of formation of `H_(2)O_(2)(l)` and `H_(2)O(l)` are `-188` and `-286KJ//mol` respectively isA. `-196` KJ/molB. `+196` KJ/molC. `+948` KJ/molD. `-948` KJ/mol

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