According to the ideal gas law, what happens to pressure if the volume increases while the amount of gas and temperature stay constant?

Enhance your knowledge and skills for the UCF CHM2046 Chemistry Fundamentals II Test 3. Dive into multiple choice questions with explanations and get confident for success in your exam!

According to the ideal gas law, which is represented by the equation PV = nRT, where P stands for pressure, V for volume, n for the number of moles of gas, R for the gas constant, and T for temperature, the relationship between pressure and volume is described by Boyle's Law when the amount of gas (n) and temperature (T) are held constant.

Boyle's Law states that for a given amount of gas at constant temperature, the pressure of the gas is inversely proportional to its volume. This means that if the volume of the gas increases while the amount of gas and the temperature remain constant, the pressure will decrease.

For instance, if you have a gas in a sealed container and you were to expand the volume of that container (let's say by pulling a piston), the gas molecules have more space to move around. This increased volume leads to fewer collisions between the gas molecules and the walls of the container per unit of time, resulting in a decrease in pressure. Therefore, as volume increases, pressure decreases when both the temperature and the amount of gas are held constant.

This fundamental relationship highlights how gases behave under various conditions and is crucial for understanding processes in chemistry and physics.

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