Unit 2 Key Concepts and Skills

Identify forms of energy and energy transformations

Identify examples of the first and second Laws of Thermodynamics

Use the first Law of Thermodynamics to determine changes in the energy of a system

Explain the role of entropy in the flow of time

Give examples of high and low entropy situations

Explain why atoms cannot be seen

Explain the cause of Brownian motion and what it tells us about molecular motion

Explain what diffusion is and why particles move outward rather than inward

Describe the relationship between atomic motion and thermal expansion

Relate various temperature-related phenomena to the speed of atomic motion

Relate convection to thermal expansion

Relate phase changes to atomic motion

Use a heating curve to find: melting point, boiling point, heat of fusion, and heat of vaporization

Describe the differences between Fahrenheit, Celsius, and Kelvin temperature scales

Convert between Celsius and Kelvin

Explain why the Kelvin scale is the best

Differentiate between heat and temperature

Use the heat equation

Explain gas pressure in terms of molecular motion

Use the equations from the various gas laws