Question

H-H, X-X and H-X bond energies are 104 Kcal/mole 60 Kcal/mole and 101 Kcal/mole Assuming the electro negativity of hydrogen to
be 2.1 the electro negativity of unknown element X is ( 19 = 4.36)​

Answer 1

Answer:

X

A

−X

B

=0.208

Δ

Δ=E

H−X

−

2

1

[E

H−H

+E

X−X

]

⟹Δ=20

⟹X

A

−X

B

=0.208

20

⟹X

A

−X

B

=0.93

⟹X

A

−2.1=0.93

X

A

=0.93+2.1=3

Explanation:

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