Topic 1 First Law of Thermodynamics

State the First Law of Thermodynamics.

Topic 2 Heat Capacity

Explain qualitatively why

Topic 3 Phase Change

What are the heats of fusion and vaporization?

Topic 4 Conduction

Explain qualitatively why

Examples

If it takes 4.186 J to raise the temperature of 1 kg of water 1^o C and it takes 10 stirs per J of energy, how many times must one stir a 250 mL cup of coffee to warm it 5^o C? (50,000 stirs)

A sports car of mass 1,000 kg is traveling at 30 m/s and suddenly stops. If it takes 479 J to raise the temperature of one killogram of steel one degree C, how massive must be the brakes if their temperature change is to be 100^o C? (9.4 kg)

Textbook Problems