IB Physics SL E.4.1 Fission Energy Release

Practise calculating energy released in spontaneous or neutron-induced fission from mass defect or increased product binding energy and converting energy per event to power.

Syllabus
First assessment 2025
Objective
Level
SL

Exam points

  • balance the fission equation before calculating the total reactant and product masses
  • calculate Q from mass loss with c² or from the increase in total binding energy
  • multiply energy per fission by reaction rate and convert MeV to joules when finding power

E.4.1—Fission energy release question 1

[Maximum number: 3]

This question is in two parts. Part 1 is about energy resources. Part 2 is about thermal physics.
Part 1 Energy resources
Electricity can be generated using nuclear fission, by burning fossil fuels or using pump storage hydroelectric schemes.

Fission of one uranium-235 nucleus releases 203 MeV .

Determine the maximum amount of energy, in joule, released by 1.0 g of uranium-235 as a result of fission.

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