molar volume of gases sc14e

Question 1

Describe what is meant by the molar
volume of a gas.

Answer 1

the volume occupied by one mole of gas

Question 2

Use the molar volume in calculations
involving solids and gases in reactions.

Answer 2

molar volume (dm⁻³ mol⁻¹) = gas volume (dm⁻³ ) ÷ number of moles (mol)

Question 3

Recall Avogadro’s law.

Answer 3

Avogadro’s law states that under the same conditions the same number of moles of different gases all occupied the same volume.

one mole of any gas always occupies 24 dm³ or 24,000 cm³ at room temperature and pressure (= 20 degrees and 1 atmosphere)

Question 4

Use Avogadro’s law to calculate the
volumes of reacting gases.

Answer 4

volume (dm³) = moles x 24