P11 Energy (4) - Thermal energy and heat

During the 1700s, scientists thought that warmth and coldness were caused by

• The caloric fluid

• Transfer of energy

• Vibrations in materials

• Kinetic molecular theory

Which of the following have the strongest attraction force between particles?

• Soilds

• Liquids

• Gases

• Plasma

Thermal energy is measured in the SI unit

• Joules

• Celcius

• Fahrenheit

• Kelvin

The average kinetic and potential energy in a substance is the

• Temperature

• Total thermal energy

• Caloric

• Mechanical energy

What is absolute zero in celsius?

• 212

• -273

• 0

• -100

What is 298 K in celsius?

• 25

• -25

• 571

• 0

What is -50 C in kelvins?

• 323

• -50

• 223

• 123

What is 80 Fahrenheit in Celsius? (answer approximately)

• 55

• 100

• 25

• 0

The temperature when a material goes from gas to liquid is the

• Boiling point

• condensation point

• melting point

• vaporization point

If an object (x) is at the same temperature and has half the mass of another object (y), then the thermal energy of x is

• 2 times y

• 1/2 y

• 1/4 y

• 4 times y