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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

`-180 kcal `

B

`-196 kcal`

C

`- 98 kcal `

D

`54 kcal `.

Text Solution

Verified by Experts

The correct Answer is:
C
`Delta H= 1/2 Delta H_1 + 1/2 Delta H_2 = -(152)/(2) - 44/2 =- 98` kcal.
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