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Gulzar Arpit Jayaraman
Asked: 2022-10-31T07:33:42+05:30 In:

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 is
A. `-196 kJ//mol`
B. `+196 kJ//mol`
C. `+948 kJ//mol`
D. `-948 kJ//mol`

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 is
A. `-196 kJ//mol`
B. `+196 kJ//mol`
C. `+948 kJ//mol`
D. `-948 kJ//mol`
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  1. Correct Answer – 1

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Seema Cherian
Asked: 2022-10-29T01:55:31+05:30 In:

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 is
A. `-196` KJ/mol
B. `+196` KJ/mol
C. `+948` KJ/mol
D. `-948` KJ/mol

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 is
A. `-196` KJ/mol
B. `+196` KJ/mol
C. `+948` KJ/mol
D. `-948` KJ/mol
Parabola
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Leave an answer

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1 Answer

  1. 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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