S1.5 SL - Ideal gases

Molecules in a real gas have...

A significant volume, intermolecular forces and inelastic collisions.

Molecules in an ideal gas have...

Negligible volume, no intermolecular forces and elastic collisions.

The ideal gas law most accurately reflects the behaviour of real gases at...

High temperature and low pressure.

The ideal gas law least accurately reflects the behaviour of real gases at...

Low temperature and high pressure.

At low temperature...

Particles have low kinetic energy and so intermolecular forces become significant.

At high pressure...

The high concentration of particles means that their volume becomes significant.

Standard temperature and pressure is...

273.15 K and 100 kPa.

At standard temperature and pressure the...

molar volume is 22.7 dm3 mol-1.

Relationship between P & V (at constant T and n) is...

Inversely proportional

Relationship between P & T (at constant V and n)

AND

Relationship between V & T (at constant P and n) is...

Directly proportional

Units for T required in gas laws is...

Kelvin

Units for P and V in the ideal gas equation are...

dm3 and kPa (or m3 and Pa)

Avogadro's law states that for any gas...

V ∝ n (at constant T and P)