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Question 18N.2.HL.TZ0.c

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.2.HL.TZ0.c
Level HL Paper 2 Time zone TZ0
Command term State Question number c Adapted from N/A
c.
[Maximum mark: 1]
18N.2.HL.TZ0.c

Liquid oxygen at its boiling point is stored in an insulated tank. Gaseous oxygen is produced from the tank when required using an electrical heater placed in the liquid.

The following data are available.

Mass of 1.0 mol of oxygen                                 = 32 g

Specific latent heat of vaporization of oxygen   = 2.1 × 105 J kg–1

State one assumption of the kinetic model of an ideal gas that does not apply to oxygen.

[1]

Markscheme

ideal gas has point objects ✔

no intermolecular forces ✔

non liquefaction ✔

ideal gas assumes monatomic particles ✔

the collisions between particles are elastic ✔

 

Allow the opposite statements if they are clearly made about oxygen eg oxygen/this can be liquified

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