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The reaction CH(4) (g) + Cl(2) (g) rarr ...

The reaction `CH_(4) (g) + Cl_(2) (g) rarr CH_(3)Cl (g) + HCl (g)` has `Delta H = -25` kCal.
`{:("Bond","Bond Energy k Cal"),(epsi_(C - Cl),84),(epsi_(H - Cl),103),(epsi_(C - H),x),(epsi_(Cl - Cl),y),(" "x : y = 9 : 5,):}`
From the given data, what is the bond energy of `Cl- Cl` bond (in k.cal)

A

70

B

80

C

67.75

D

57.75

Text Solution

Verified by Experts

The correct Answer is:
D
`103 + 3x + 84 - (4x + y) = 25`. Given `x : y = 9:5` Solving for x and y, we get `Cl - Cl` bond energy.
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