Heat of Fusion Worksheet
Explore the concept of heat of fusion, latent heat, and phase changes between solid and liquid states with this comprehensive worksheet for Grade 11 Chemistry students.
Includes
Standards
Heat of Fusion: Phase Changes
Name:
Date:
Score:
Read each question carefully and provide your best answer. Show all your work for calculations.
1. What is the definition of heat of fusion?
The energy required to raise the temperature of a substance by 1°C.
The energy absorbed or released during a phase change from liquid to gas.
The amount of energy required to change a substance from solid to liquid at its melting point.
The amount of energy released when a substance changes from gas to liquid.
2. What happens to the temperature of a substance during a phase change, such as melting?
It increases rapidly.
It decreases rapidly.
It remains constant.
It fluctuates unpredictably.
3. The heat of fusion is a type of heat, meaning it is absorbed or released without a change in temperature.
4. When a substance freezes, it energy, and the process is called .
5. Explain, in terms of molecular energy, why energy is required to melt a solid even though its temperature does not change.
6. Calculate the amount of heat (in Joules) required to melt 50.0 grams of ice at 0°C. The heat of fusion for water is 334 J/g.
7. The heat of fusion of a substance is always a positive value.
True
False