Chapter #9 - The Kinetic Particle Model of Matter Flashcards
Explain the size properties of a solid.
Rigid, fixed shape, fixed volume, cannot be squashed.
Explain the size properties of a liquid.
Not rigid, no fixed shape, fixed volume, cannot be condensed easily.
Explain the size properties of a gas.
Not rigid, no fixed shape, no fixed volume, can be squashed.
What happens as you heat up something?
The particles gain kinetic energy, causing the paricles to move fatster. As the particles move faster, they spread further apart. This causes the particles to decrease in density.
What is browanian motion?
The motion of small particles suspended in a liquid or gas, caused by molecular bombardment.
What is absolute zero?
The temperature at which particles have no kinetic energy.
What are attractive forces?
Forces between particles which hold the particles in fixed positions in solid.
Why does gas cause preassure on the walls of its container?
Because the gas particles are constatntly colliding with the walls.
What happens when a gas is heated?
The higher the temp. of a gas, the faster its particles are moving. The particles will hit the wall more often with more force, this cause the preassure to increase.
What happens when a gas is compressed?
The volume of the container has been decreased. the gas has been compressed into a smaller spaces. the particles don’t move as far between collisions, so they collide with the walls for often. this decreases the volume and increases the preassure.
Why do we observe smoke particles instead of air particles?
Because smoke particles are much larger than air particles. This makes it possible to observe them under a michroscopes.
What is the equation to convert from Kelvin to Celcius?
Temp. of Kelvin = Temp. of Clecius + 273
What is the definition of internal energy?
The total energy of the particles in a substance (a bathtub has more energy than a hot cup of tea).
