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Question 20N.2.HL.TZ0.6b(iii)

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Date November 2020 Marks available [Maximum mark: 1] Reference code 20N.2.HL.TZ0.6b(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.TZ0.6b(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.

(b(iii))

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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