IB Chemistry SL 1.5.2 Real Gases

Practise predicting when real gases deviate from the ideal model. At low temperature and high pressure, intermolecular attraction and molecular volume become significant;…

Exam points

select high temperature and low pressure as conditions closest to ideal behaviour
compare gases by polarity and intermolecular-force strength to predict deviation
explain why finite molecular volume matters increasingly as gas pressure rises

[Maximum number: 2]

Alkanes are commonly occurring organic compounds.

The first four straight chain alkanes are gases at room temperature.

Boiling points of straight chain alkanes

Outline why the volume occupied by propane(g) at very high pressure is higher than the value calculated using PV=nRT.

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1.5.2—Real gases question 1