DP Physics (last assessment 2024)

Question 20N.2.SL.TZ0.6b(i)

b(i).

[Maximum mark: 2]

20N.2.SL.TZ0.6b(i)

A nuclear power station uses U-235 as fuel. Assume that every fission reaction of U-235 gives rise to $180 MeV$ of energy.

(b(i))

Estimate, in $J {kg}^{- 1}$ , the specific energy of U-235.

[2]

Markscheme

see $« energy = » 180 \times 10^{6} \times 1.60 \times 10^{- 19}$ AND $« mass = » 235 \times 1.66 \times 10^{- 27}$ ✓

$7.4 \times 10^{13} « J {kg}^{- 1} »$ ✓

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