Question

Lesson Question: What is the effect of pressure on the volume of a gas?

To answer this question, you used weight to change the
✔ pressure
of the gas and measured the
resulting changes to the gas’s
✔ volume.
The amount of gas (in terms of moles, mass, and molecules)

Answer 1

As you increased the pressure (by adding weight), the gas’s volume decreased — an inverse relationship. For a fixed amount of gas at constant temperature, Boyle’s law applies: P · V = constant, or V ∝ 1/P (doubling P halves V, etc.).

The amount of gas (moles, mass, and molecules) remained constant during the experiment.