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If, H(2)(g)+Cl(2)(g)rarr 2HCl(g) , Delta...

If, `H_(2)(g)+Cl_(2)(g)rarr 2HCl(g) , Delta H^(@)=-44` Kcal
`2Na(s)+2HCl(g)rarr 2NaCl(s)+H_(2)(g), Delta H=-152` Kcal Then, `Na(s)+0.5Cl_(2)(g)rarr NaCl(s) , Delta H^(@) = ?`

A

`-98 kcal`

B

`54 kcal`

C

`-108 kcal`

D

`-196 kcal`

Text Solution

Verified by Experts

The correct Answer is:
D
`2Na_((s))+Cl_(2(g)) rarr 2NaCl_((s)), Delta H=?`
This equation is obtained by equation (i) + equation (ii)
`Delta H = Delta H_(1)+Delta H_(2)`
`=-44+(-152)`
`Delta H =-196 kcal`
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