DP Physics (last assessment 2024)

Question 20N.2.HL.TZ0.b(iii)

Date	November 2020	Marks available	[Maximum mark: 1]	Reference code	20N.2.HL.TZ0.b(iii)
Level	HL	Paper	2	Time zone	TZ0
Command term	Suggest	Question number	b(iii)	Adapted from	N/A

b(iii).

[Maximum mark: 1]

20N.2.HL.TZ0.b(iii)

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

The specific energy of fossil fuel is typically $30 MJ {kg}^{- 1}$ . Suggest, with reference to your answer to (b)(i), one advantage of U-235 compared with fossil fuels in a power station.

[1]

Markscheme

«specific energy of uranium is much greater than that of coal, hence» more energy can be produced from the same mass of fuel / per $kg$
OR
less fuel can be used to create the same amount of energy ✓

Examiners report

HL only. This was well answered.

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Core

Core » Topic 8: Energy production » 8.1 – Energy sources

Core » Topic 8: Energy production

Question 20N.2.HL.TZ0.b(iii)

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