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Calculate H^(@) for the reaction , Na(2...

Calculate `H^(@)` for the reaction ,
` Na_(2)O(s)+SO_(3)(g)toNa(2)SO_(4)(g)`
(A)` Na(s)+H_(2)O(l)toNaOh(s)+(1)/(2)H_(2)(g)`
`DeltaH^@)=-146kJ`
(B) `Na_(2)SO_(4)(s)+(H)_(2)O(l)to2Na(s)+SO_(3)(g)`
` DeltaH^(@)=+418kJ`
(C) `2Na_(2)O(s)+2H_(2)(g))to4Na(s)+2H_(2)O(l)`
`DeltaH^(@)=+259kJ`

A

`+832kJ`

B

`-581kJ`

C

`-431kJ`

D

`+531kJ`

Text Solution

Verified by Experts

The correct Answer is:
B
`Na_(2)O+SO_(3)toNa_(2)SO_(4)`
The above equation can be obtained by,
2A+`(C)/(2)`-B
`thereforeDeltaH=2A+(C)/(2)-B
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