At what point does the substance begin to melt?

• I
• II
• III
• IV
• V

At what point is the substance a liquid?

• I
• II
• III
• IV
• V

At what point is the substance a solid?

• I
• II
• III
• IV
• V

At what point is the substance a gas?

• I
• II
• III
• IV
• V

What is the melting point of this substance? (Temperature in degrees Celsius)

• -15
• 5
• 55
• 80

What is the boiling point of this substance? (Temperature in degrees Celsius)

• -15
• 5
• 55
• 80

True or False: As energy is absorbed, the temperature of the substance rises.

• True
• False

True or False: Heat of vaporization is the energy required to change a substance from solid to liquid at its melting point.

• True
• False

Fill in the blank: The cooling curve will be the reverse of the heating curve. Energy will be released as the substance changes from a ____________ to a ___________ and also from a ____________ to a ____________.

• solid, liquid, liquid, gas
• liquid, gas, gas, solid
• gas, liquid, liquid, solid
• gas, solid, solid, liquid

Which of the following is not an assumption of the kinetic theory?

• All matter is composed of tiny particles (atoms, molecules and ions)
• Particles are not in constant, random motion
• Particles collide with each other and with the walls of any container in which they are held
• The amount of energy that the particles lose from these collisions is negligible