Suppose, we think of fission of a 56 26 Fe nucleus into two equal fragments, 28 13 Al. Is the fission energetically possible? Argue by working out Q of the process. Given m ( 56 26 Fe) = 55.93494 u and m ( 28 13 Al) = 27.98191 u.

Question

Philoid · Accepted Answer

The fission reaction can be given as :

The Q value for this reaction will be given as = [m()-2 × m()] × c²

= (55.93494-2 × 27.98191)u × c² MeV

= -0.02888u × c² MeV

= -0.02888 × 931.5

= -26.902MeV

The Q value is negative which suggests this reaction is endothermic, but we know fission reactions are exothermic. Hence, this fission reaction is not energetically possible.

Suppose, we think of fission of a 5626Fe nucleus into two equal fragments, 2813Al. Is the fission energetically possible? Argue by working out Q of the process. Given m (5626Fe) = 55.93494 u and m (2813Al) = 27.98191 u.

Suppose, we think of fission of a ⁵⁶₂₆Fe nucleus into two equal fragments, ²⁸₁₃Al. Is the fission energetically possible? Argue by working out Q of the process. Given m (⁵⁶₂₆Fe) = 55.93494 u and m (²⁸₁₃Al) = 27.98191 u.