Structure of Atom - Result Question 5
####5. The energy absorbed by each molecule $(A_2)$ of a substance is $4.4 \times 10^{-19} J$ and bond energy per molecule is $4.0 \times 10^{-19} J$. The kinetic energy of the molecule per atom will be:
(a) $2.2 \times 10^{-19} J$
(b) $2.0 \times 10^{-19} J$
(c) $4.0 \times 10^{-20} J$
(d) $2.0 \times 10^{-20} J$
[2009]
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Solution:
- (d) K.E per atom
$ \begin{aligned} & =\frac{(4.4 \times 10^{-19})-(4.0 \times 10^{-19})}{2} \\ & =\frac{0.4 \times 10^{-19}}{2}=2.0 \times 10^{-20} J \end{aligned} $
