14.3 Pressure in Gases

• Pressure in gases is exerted in all directions.
• In which direction is pressure in gases exerted?

  In all directions
• Pressure is defined as the force per unit area
• A higher temperature increases the kinetic energy of gas particles, leading to more frequent and forceful collisions
• Boyle's Law states that the pressure of a gas is inversely proportional to its volume
• Match the change in volume with the corresponding change in pressure according to Boyle's Law:

  Volume increases ↔️ Pressure decreases

  Volume decreases ↔️ Pressure increases
• The mathematical expression for Boyle's Law is $P \times V =$$\text{constant}$, which indicates that the product of pressure and volume remains constant.
• Charles' Law states that pressure and temperature are directly proportional at constant volume.


  True
• The Combined Gas Law combines Boyle's and Charles' Laws to describe the relationship between pressure, volume, and temperature of a gas.
• The Combined Gas Law can be used to calculate the change in any one variable when the other two are known.


  True
• Unlike solids and liquids, gas pressure is exerted in all directions.
• Boyle's Law states that pressure and volume are inversely proportional at constant temperature.


  True
• Boyle's Law states that pressure is directly proportional to volume at constant temperature

  False
• If the volume of a gas doubles, its pressure is halved according to Boyle's Law


  True
• Charles' Law states that pressure is directly proportional to temperature at constant volume


  True
• Match the change in temperature with the corresponding change in pressure according to Charles' Law:

  Temperature increases ↔️ Pressure increases

  Temperature decreases ↔️ Pressure decreases
• The Combined Gas Law combines Boyle's and Charles' Laws


  True
• Match the gas law with its corresponding formula:

  Boyle's Law ↔️ $P_{1}V_{1} =$$P_{2}V_{2}$

  Charles' Law ↔️ $\frac{P_{1}}{T_{1}} =$$\frac{P_{2}}{T_{2}}$

  Combined Gas Law ↔️ $\frac{P_{1}V_{1}}{T_{1}} =$$\frac{P_{2}V_{2}}{T_{2}}$
• Pressure is defined as the **force per unit area**. It is a key concept in understanding the behavior of gases.
• Pressure in gases is directly proportional to the temperature of the gas.

  True
• How do gas particles create pressure in a container?

  By colliding with the walls
• The pressure in a gas is directly proportional to its temperature.


  True
• Steps in how gas particles create pressure:

  1️⃣ Gas particles move randomly within the container

  2️⃣ Particles collide with the container walls

  3️⃣ Collisions exert force over the surface area

  4️⃣ The force per unit area creates pressure

  5️⃣ Higher temperature increases kinetic energy and pressure
• Pressure in gases is only exerted downwards.

  False
• Boyle's Law describes the relationship between the pressure and volume of a gas at constant temperature.
• According to Boyle's Law, if the volume of a gas decreases, its pressure increases.


  True
• The mathematical expression for Charles' Law is $\frac{P}{T} =$$\text{constant}$, which indicates that the ratio of pressure to temperature remains constant.
• The Combined Gas Law assumes that the mass and number of particles in the gas remain constant.

  True
• Pressure is defined as the force acting per unit area on a surface.
• Gas pressure is directly proportional to temperature.

  True
• The mathematical expression for Boyle's Law is P \times V = \text{constant}</latex>, which indicates that the product of pressure and volume remains constant.
• What is the mathematical expression for Boyle's Law using proportionality?

  $P \propto \frac{1}{V}$
• What variables does Boyle's Law relate?

  Pressure and volume
• What is the mathematical expression for Charles' Law using proportionality?

  $P \propto T$
• If the temperature of a gas doubles, its pressure also doubles according to Charles' Law


  True
• What is the mathematical formula for the Combined Gas Law?

  $\frac{P_{1}V_{1}}{T_{1}} =$$\frac{P_{2}V_{2}}{T_{2}}$
• The Combined Gas Law accounts for changes in all three variables: pressure, volume, and temperature


  True
• Pneumatic tools use compressed air to perform tasks


  True
• Correct tire pressure improves fuel efficiency and vehicle handling

  True
• In hydraulic systems, compressed air or hydraulic fluid transmits force