Difference between Pressure and compression/expansion?

[Diwana Lucero 3K]

Can someone explain if there's a difference between pressure and compression/expansion? One of the questions in the workbook quiz asked if expansion occurs, what will happen to the partial pressure of the product and I wasn't sure how to approach the problem.

[Julianne_Zingmond_1E]

Theoretically, if the gas has room to expand, the pressure would decrease. If the volume decreases and the gas is compressed, the pressure would increase. This is all based off of the ideal gas equation of PV=nRT, where P and V are inversely related.

[edward_qiao_3I]

Compression/expansion is just a description of change in volume, which in turn has an impact on pressure given by P=nRT/V, where pressure and volume have an inverse relationship. Most of these problems also hold temperature constant, so you can just use P=n/V

[Jata_Kavya_3A]

How does expansion/compression affect which way the equilibrium shifts? like what is the relationship

[Justin_Yi_1J]

When expansion or compression occurs, the system will try to minimize the change. If it is compressed, the pressure increases. To counteract this, the system shifts to the side with less moles of gas in order to minimize the change in pressure. Vice-versa for expansion.

[JELCI_BARRAZA_1C]

which way does a reaction shift if expansion occurs?