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Unit 3: Particle Model of Matter
3.3 Particle Motion in Gases
3.3.2 Temperature and Kinetic Energy
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Cards (23)
Kinetic energy
is the energy an object possesses due to its
motion
Kinetic energy depends only on the mass of an object.
False
Kinetic energy is measured in joules.
True
The higher the
temperature
of a substance, the greater the
average kinetic energy
of its
particles
Match the temperature level with the corresponding kinetic energy:
Low temperature ↔️ Lower average kinetic energy
High temperature ↔️ Higher average kinetic energy
Arrange the following in terms of increasing kinetic energy:
1️⃣ Low temperature
2️⃣ High temperature
The higher the
temperature
of a substance, the faster the particles move on
average
Average kinetic energy depends on the mass and average speed of
particles
.
True
Higher temperatures lead to increased average kinetic
energy
Temperature
is a measure of the
average kinetic energy
of the particles in a
substance
Higher temperatures lead to increased
average kinetic energy
of the
particles
What is kinetic energy defined as?
Energy of motion
Kinetic energy depends on the mass and
average speed
of particles.
True
What is average kinetic energy a measure of?
Energy of motion
Temperature is a measure of the average kinetic energy of
particles
Kinetic energy depends on both the mass and
speed
of an object.
True
What is the formula for calculating kinetic energy?
KE
=
\text{KE} =
KE
=
1
2
m
v
2
\frac{1}{2}mv^{2}
2
1
m
v
2
Match the variable with its description:
Kinetic Energy (KE) ↔️ Energy due to motion
Mass (m) ↔️ Amount of matter in an object
Speed (v) ↔️ Rate at which an object is moving
The temperature of a substance is a measure of the average kinetic energy of its
particles
How does temperature affect the kinetic energy of particles in a substance?
Higher temperature, higher KE
Increased temperature provides particles with more thermal energy, which increases their average
kinetic energy
.
True
What happens to the kinetic energy of gas particles as the temperature increases?
Increases
Higher kinetic energy in gas particles causes the gas to expand, exert greater
pressure
, and diffuse more rapidly.