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Questions and Answers
What is temperature a measure of?
Temperature is a measure of average kinetic energy.
What happens during the diagonal line segments on a heating or cooling curve?
During the diagonal line segments, there is a temperature change and a change in kinetic energy.
What happens during the horizontal line segments on a heating or cooling curve?
During the horizontal line segments, there is no change in temperature and kinetic energy remains constant.
How is the energy absorbed or released related to changes?
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What are the two horizontal flat parts on a heating curve called and what do they represent?
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What is the first change of state on a heating curve and what is the temperature during this change for water?
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What is the second change of state on a heating curve and what is the temperature during this change for water?
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What is the graph of temperature against time on a heating curve called?
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What happens to the temperature of a block of ice when a Bunsen burner is placed underneath it?
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Study Notes
Temperature Measurement
- Temperature is a measure of the average kinetic energy of particles in a substance.
Heating and Cooling Curves
- During diagonal line segments, the substance absorbs or releases energy, and its temperature increases or decreases.
- During horizontal line segments, the substance is undergoing a phase change (e.g., melting or boiling) at a constant temperature.
Energy and Phase Changes
- The energy absorbed or released during a phase change is related to the change in state (e.g., solid to liquid or liquid to gas).
Heating Curve Components
- The two horizontal flat parts on a heating curve are called plateaus, which represent the melting and boiling points of a substance.
Phase Changes on a Heating Curve
- The first change of state on a heating curve is melting, which occurs at 0°C (32°F) for water.
- The second change of state on a heating curve is boiling, which occurs at 100°C (212°F) for water.
Heating Curve Graph
- The graph of temperature against time on a heating curve is called a heating curve.
Ice and Heat
- When a Bunsen burner is placed underneath a block of ice, the ice absorbs energy, and its temperature increases until it reaches its melting point (0°C or 32°F), at which point it starts to melt.
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Description
Test your understanding of energy changes during temperature changes and heating or cooling curves with this quiz. Explore the relationship between temperature and kinetic energy as you answer questions about state of matter and thermal processes.
