Volume

[Russell Chuang 1J]

Why does volume need to change and not just pressure in order to affect the rate/direction of the reaction?

[Sophia Zhao]

When gas expands in a reaction, and the volume remains constant, the external pressure on the system will not match up with the natural pressure within the system. The volume needs to expand along with the gas expansion to prevented undesirable external variables.

[Mara Crooks 1F]

Volume would need to change as well as pressure to make it balanced as pressure concentrations would be different for different volumes.

[Amy Wong 2F]

In the ideal gas law, PV=nRT, pressure and volume have an inverse relationship (i.e., if pressure increases, volume decreases, and vice versa). Usually, a change in the pressure of a system is enacted by changing the volume, because of this relationship outlined in the ideal gas law.

[Clarence Clavite 2K]

Pressure and volume have an inverse relationship according to the ideal gas law. The gas law represents what occurs in reaction. It is possible to just change just pressure or volume, but doing so causes problems with calculations. He mentioned it in the lecture though I don't recall exactly what he said. Hope this helps!

[Sarah Wang 1I]

The increase in pressure is due to the decrease in volume, and the decrease in volume changes the concentrations. The resulting change in concentration is what ultimately shifts the reactions.

[Kendall Brown]

In order for the concentrations to stay consistent, volume needs to increase as the pressure increases.