DP Chemistry (last assessment 2024)

Question 20N.3.hl.TZ0.e(iv)

Date	November 2020	Marks available	[Maximum mark: 1]	Reference code	20N.3.hl.TZ0.e(iv)
Level	hl	Paper	3	Time zone	TZ0
Command term	Determine	Question number	e(iv)	Adapted from	N/A

e(iv).

[Maximum mark: 1]

20N.3.hl.TZ0.e(iv)

Gasoline (petrol), biodiesel and ethanol are fuels.

[U.S. Department of Energy. https://afdc.energy.gov/]

Determine the relative rate of effusion of methane ( $M_{r} = 16.05$ ) to carbon dioxide ( $M_{r} = 44.01$ ), under the same conditions of temperature and pressure. Use section 1 of the data booklet.

[1]

Markscheme

«rate of effusion of $\frac{{CH}_{4}}{{CO}_{2}} = \sqrt{\frac{44.01}{16.05}} = » 1.656$ ✔

Examiners report

The determination of the relative rate of effusion of methane to carbon dioxide was almost universally correctly computed as 1.656.

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Options » C: Energy » C.7 Nuclear fusion and nuclear fission (HL only)

Options » C: Energy

Question 20N.3.hl.TZ0.e(iv)

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