Icy Hot lab
Guide to energy bar charts
Energy reading note and energy bar charts
Review Key Front
Review Key Back
1. Relate observations regarding the addition of energy by warming to increased particle motion
2. Describe the characteristics of solids, liquids and gases in terms of particles and their:
· Arrangement: use particle diagrams to account for motion and density differences; describe the process of how the arrangement of matter particles changes during phase changes.
· Attractions: infer the necessity of an attractive force between particles at close range from observations of differences in cohesiveness of the three phases;
3. Define energy; describe the ways in which it is stored in a system.
4. Describe three ways in which energy is transferred between system and surroundings.
5. Draw energy bar charts to account for energy storage and transfer in all sorts of changes. Make up a sample situation and sketch the bar chart.
6. Given a heating/cooling curve for a substance, identify what phase(s) is/are present in the various portions of the curve, and what the melting and freezing
temperatures for the substance are.
7. Given a heating/cooling curve for a substance, identify which energy storage mode is changing for the various portions of the curve.
8. Given a situation in which a substance at a given temperature undergoes a change (in temperature, phase or both), sketch a heating/cooling curve that represents the situation.
9. State the physical meaning of the heat of fusion (Hf) and heat of vaporization (Hv) for a given substance. Use these factors to relate the mass of a substance to the energy absorbed or released during a phase change (at the melting or boiling temperature).
10. State the physical meaning of the heat capacity (c) of a substance and use this factor to relate the mass and temperature changes to the energy absorbed or released during a change in temperature (with no phase change).