Heating Curve Analysis
A Grade 11 Science worksheet focusing on the analysis and interpretation of heating curves, including phase changes, energy calculations, and key terminology.
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Heating Curve Analysis
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Read each question carefully and provide thorough answers. Refer to the heating curve diagram provided when necessary.
Observe the generalized heating curve below for a substance as heat is added over time.
1. Which segment(s) of the heating curve represent a phase change?
Segments A, C, E
Segments B, D
Segments A, B, C, D, E
Segments A, B, D
2. What happens to the kinetic energy of the particles during segment B?
Increases
Decreases
Remains constant
Cannot be determined
3. The temperature at which a solid turns into a liquid is called the .
4. During a phase change, the added heat energy is used to overcome the forces between particles, rather than increasing their kinetic energy.
5. The amount of heat required to melt one mole of a solid at its melting point is known as the enthalpy of .
6. Explain why the temperature remains constant during a phase change, even though heat is continuously being added.
7. For a pure substance, the boiling point and condensation point are identical.
True
False
8. The slope of the heating curve is steeper in the gas phase than in the liquid phase for most substances.
True
False
Match each term on the left with its definition on the right.
9. Melting Point
a. The process of a liquid becoming a gas.
10. Boiling Point
b. The temperature at which a solid turns into a liquid.
11. Vaporization
c. The temperature at which a liquid's vapor pressure equals the external pressure.
12. Condensation
d. The process of a gas becoming a liquid.