Calculate and compare the energy released by a. fusion of 1.0 kg of hydrogen deep within Sun and b. the fission of 1.0 kg of `.^(235)U` in a fission reactor.

Explanation

(a) Note that in the interior of Sun, four ` ""_(1)^(1)H` nuclei combine to form one `""(2)^(4)He` nucleus releasing about 26 MeV of energy per event. Energy released in fusion of 1kg of hydrogen `= 39 xx 10^(26) MeV`
(b) Energy released in fission of 1kg of `""_(92)^(235) U= 5.1 xx 10^(26) MeV`
The energy released in fusion of 1 kg of hydrogen is about 8 times that of the energy eleased in the fission of 1 kg of uranium.