Nuclear Chemistry - Result Question 8
####11. $ _92^{235} U+ _0^{1} n \to _92^{236} U \to$ fission products + neutrons $+3.20 \times 10^{-11} J$ The energy released when $1 g$ of $ _92^{235} U$ finally undergoes fission is
[1997]
(a) $12.75 \times 10^{8} kJ$
(b) $16.40 \times 10^{7} kJ$
(c) $8.20 \times 10^{7} kJ$
(d) $6.50 \times 10^{6} kJ$
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Solution:
- (c) 1 atom of $ _92^{235} U$ on fission gives energy
$ =3.2 \times 10^{-11} J $
$6.023 \times 10^{23}$ atom ( 1 mole) on fission gives energy $=3.2 \times 10^{-11} \times 6.023 \times 10^{23} J$
$1 g$ of $ _92^{235} U$ on fission gives energy
$=\frac{6.023}{235} \times 3.2 \times 10^{12} J=8.2 \times 10^{7} kJ$
