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IB Chemistry SL 1.5.2 Real Gases Questions

Relate equal gas volumes at the same temperature and pressure to equal amounts, then use balanced-equation volume ratios and molar volume at STP/SATP.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Explain real-gas deviation at low temperature and high pressure using finite particle volume and intermolecular attractions.
  • Identify that stronger intermolecular forces and finite molecular volume cause departures from the ideal-gas model.
  • Compare gases and conditions to determine which sample is closest to or furthest from ideal behaviour, using temperature, pressure and polarity.

IB Chemistry SL 1.5.2 Real Gases Questions question 1

[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

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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