Kinetic theory (volume, pressure, temp)

What do we call the the amount of force exerted on a certain area?

• fluid

• pressure

• buoyant

Answer explanation

The amount of force exerted on a certain area is called pressure. It quantifies how concentrated that force is over the area, making 'pressure' the correct term in this context.

Which of the following would increase the pressure on a system?

• Increase the Temperature

• Pump in more fluid

• Decrease the volume

• All of these

Answer explanation

Increasing temperature, pumping in more fluid, or decreasing volume all raise pressure in a system. Therefore, the correct answer is 'All of these' as each option contributes to increased pressure.

If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?

• The pressure will increase

• The pressure will decrease

• The pressure will remain constant

• The pressure will equalize

Answer explanation

When a hairspray can is heated, the gas inside expands, increasing its kinetic energy. According to Gay-Lussac's law, the pressure of a gas increases with temperature if the volume is constant. Thus, the pressure will increase.

_________ is a measure of the average kinetic energy of the particles in an object. When temperature increases, the motion of these particles also increases.

• Measurement

• Pressure

• Temperature

Answer explanation

Temperature is the measure of the average kinetic energy of particles in an object. As temperature increases, the motion of these particles also increases, making temperature the correct answer.

Why does increasing the temperature of a gas increase the pressure it exerts? Choose all that apply.

• It increases the number of particles in the gas.

• It increases the speed of collisions between the particles and the container.

• It increases the size of the particles in the gas.

• It increases the number of collisions between the particles and the container.

Answer explanation

Increasing temperature raises the speed of gas particles, leading to more forceful collisions with the container walls. This results in a higher number of collisions, both of which increase the pressure exerted by the gas.

As altitude increases, pressure increase.

• True

• False

Answer explanation

As altitude increases, air pressure actually decreases. This is because there is less air above you exerting pressure. Therefore, the statement is false.

What is the normal boiling point of water

• 0^oC

• 100^oF

• 50^oC

• 100^oC

Answer explanation

The normal boiling point of water is 100°C at standard atmospheric pressure. This is the temperature at which water transitions from liquid to gas, making 100°C the correct answer.

When you increase your altitude, the air pressure 

• increases

• decreases

• stays the same

Answer explanation

As altitude increases, the amount of air above decreases, leading to lower air pressure. Therefore, when you increase your altitude, the air pressure decreases.

What will happen to the volume of a gas if the pressure increases, with constant temperature ?

• Increase

• Decrease

• Nothing

• Explosion!

Answer explanation

According to Boyle's Law, if the temperature is constant, increasing the pressure on a gas will cause its volume to decrease. Therefore, the correct answer is 'Decrease'.

If you increase the pressure, what will happen to the temperature, if volume is constant?

• Increase

• Decrease

• Stay the same

• It will Blow Up

Answer explanation

According to Gay-Lussac's law, if the volume is constant, increasing the pressure of a gas will result in an increase in temperature. Therefore, the correct answer is 'Increase'.