pV=constant

• What causes pressure in gases?

  Pressure in gases is caused by gas particles colliding with the walls of the container.
• How can we increase the pressure of a gas?

  We can increase the pressure by increasing the temperature, increasing the number of particles, or decreasing the volume.
• What is the relationship between pressure and volume of a gas?

  Pressure and volume are inversely related; as one increases, the other decreases.
• What is the equation that represents the relationship between pressure and volume for a given amount of gas at constant temperature?

  The equation is \( PV = \text{constant} \).
• If the volume of a gas increases, what happens to its pressure?

  The pressure decreases.
• What must be true for the pressure and volume of a gas at constant temperature?

  The product of pressure and volume must always equal a constant value.
• How do you calculate the constant for a gas sample?

  You multiply the pressure by the volume of the gas sample.
• If a gas occupies a volume of 1.5 m³ at a pressure of 100 Pa, what is the constant?

  The constant is 150.
• What is the pressure exerted by a gas if it is compressed from a volume of 1.5 m³ at 100 Pa to a volume of 0.3 m³?

  The pressure is 500 Pa.
• What is the alternative method to find the pressure of a gas when the constant is the same for both containers?

  You can use the equation \( P_1 \times V_1 = P_2 \times V_2 \).
• If atmospheric air has a pressure of 101 kPa and is compressed into a volume of 12 liters, what is the pressure in the cylinder?

  The pressure in the cylinder is 15,150 kPa.
• What assumption is made about the temperature when calculating the pressure of a gas in these examples?

  The temperature remains constant.
• What unit is used for atmospheric pressure in the examples provided?

  The unit used is kilopascals (kPa).