Podcast
Questions and Answers
What is the internal energy of a substance composed of?
What is the internal energy of a substance composed of?
- Only internal kinetic energy
- Only internal potential energy
- Total kinetic energy and total potential energy (correct)
- Total kinetic energy and average kinetic energy
How does the temperature of a body change when heat is imparted to it?
How does the temperature of a body change when heat is imparted to it?
- Temperature rises (correct)
- Temperature remains constant
- Temperature falls
- Temperature fluctuates
What happens to the average kinetic energy of molecules in a substance when it is cooled?
What happens to the average kinetic energy of molecules in a substance when it is cooled?
- Remains constant
- Increases
- Decreases (correct)
- Fluctuates
Why does heat flow from a body at higher temperature to a body at lower temperature when in contact?
Why does heat flow from a body at higher temperature to a body at lower temperature when in contact?
How is heat defined in terms of the substance's energy?
How is heat defined in terms of the substance's energy?
What is the unit of measurement for heat?
What is the unit of measurement for heat?
What happens to the temperature of a substance when there is a rise in the average kinetic energy of its molecules?
What happens to the temperature of a substance when there is a rise in the average kinetic energy of its molecules?
In terms of specific heat capacities, what effect does different materials having different values have when heating them?
In terms of specific heat capacities, what effect does different materials having different values have when heating them?
What major effect does heat have when changing the state of a substance?
What major effect does heat have when changing the state of a substance?
At what temperature does water exist as a solid?
At what temperature does water exist as a solid?
What occurs when steam at 100°C condenses into water at 100°C?
What occurs when steam at 100°C condenses into water at 100°C?
What is the common unit of heat mentioned in the text?
What is the common unit of heat mentioned in the text?
What is the relationship between calories and Joules?
What is the relationship between calories and Joules?
What happens to the average kinetic energy of molecules when a substance changes its state at a constant temperature?
What happens to the average kinetic energy of molecules when a substance changes its state at a constant temperature?
What are molecules composed of?
What are molecules composed of?
Which state of matter has the least potential energy and the greatest kinetic energy?
Which state of matter has the least potential energy and the greatest kinetic energy?
What happens to the motion of molecules when a substance absorbs heat and its temperature rises?
What happens to the motion of molecules when a substance absorbs heat and its temperature rises?
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