Question

5.
The energy absorbed by each molecule (A2) of
a substance is 4.4 x 10-19 J and bond energy
per molecule is 4.0 x 10-19 J. The kinetic energy
Of molecules per atom will be

Answer 1

Answer:

We know that,

K.E. per atom=

no. of atoms in the molecules

energy absorbed−bond energy

Given: Molecule is A

2

(diatomic)

Energy absorbed =4.4×10

−19

J

Bond energy =4×10

−19

J

Therefore,

K.E. per atom=

2

(4.4×10

−19

)−(4×10

−19

)

=

2

0.4×10

−19

=2×10

−20

J

Hence, this is the required result.

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Answer 2

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