## How does the volume of the gas change with pressure?

The Relationship between Pressure and Volume: Boyle’s Law As the pressure on a gas increases, the volume of the gas decreases because the gas particles are forced closer together. Conversely, as the pressure on a gas decreases, the gas volume increases because the gas particles can now move farther apart.

## What happens to the volume when the pressure doubles?

For a fixed mass of gas at constant temperature, the volume is inversely proportional to the pressure. That means that, for example, if you double the pressure, you will halve the volume. If you increase the pressure 10 times, the volume will decrease 10 times.

**Why does increasing volume decrease pressure?**

The reduction in the volume of the gas means that the molecules are striking the walls more often increasing the pressure, and conversely if the volume increases the distance the molecules must travel to strike the walls increases and they hit the walls less often thus decreasing the pressure.

**Does decreasing volume decrease temperature?**

The pressure and temperature of a gas have a direct relationship when pressure and number of moles of gas are kept constant → this is known as Charles’ Law. Similarly, decreasing the volume of the gas, as you have in your example, will result in a decrease in temperature.

### What happens to the volume of a gas if both the pressure on the gas and its Kelvin temperature are doubled?

For a fixed mass of gas at constant pressure, the volume is directly proportional to the kelvin temperature. That means, for example, that if you double the kelvin temperature from, say to 300 K to 600 K, at constant pressure, the volume of a fixed mass of the gas will double as well.

### What happens when the volume of a gas decreases?

Because the volume has decreased, the particles will collide more frequently with the walls of the container. Each time they collide with the walls they exert a force on them. More collisions mean more force, so the pressure will increase. When the volume decreases, the pressure increases.

**How does the pressure of a gas increase with temperature?**

Gas pressure increases with temperature. Equations explain the relationship between pressure, temperature and volume in gases. Decreasing the volume of a gas increases the pressure of the gas. An example of this is when a gas is trapped in a cylinder by a piston.

**How is the pressure of a gas inversely proportional to its volume?**

When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume. This is shown by the following equation – which is often called Boyle’s law.

## What happens to the volume of air as the pressure increases?

So increasing pressure from pressure1 to pressure2 means that volume1 will change to volume2, providing the temperature remains constant. A sealed syringe contains 10 × 10-6 m3 of air at 1 × 105 Pa. The plunger is pushed until the volume of trapped air is 4 × 10-6 m3.