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The energy absorbed by each molecule ( A...

The energy absorbed by each molecule ( `A_(2)` ) of a subtance is `4.4 xx 10^(-19) J` and bond energy per molecule is `4 xx 10^(-19)`J. The kinetic energy of the molecule per atom will be

A

`2.2 xx 10^(-19) J`

B

`2.0 xx 10^(-19) J`

C

`4.0 xx 10^(-20) J`

D

` 2.0 xx 10^(-20)J`

Text Solution

Verified by Experts

The correct Answer is:
D
Kinetic enerlgy of the molecule
`= 4.4 xx 10^(-19) - 4.0 xx 10^(-19) J`
`= 0.4 xx 10^(-19) `J per molecule
Kinetic energy per atom `= ( 0.4 xx 10^(-19) ) //2 `
`= 0.2 xx 10^(-19) J = 2 xx 10^(-20) J`
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