Asked by violet
What is heat?
Heat is the energy needed to change the temperature of 1 g of a substance by 1°C.
Heat is the average kinetic energy of the particles of a substance.
Heat is the total energy of a substance due to the movement of its particles.
Heat is the energy that flows between two substances of different temperatures.
All Answers 1
Answered by
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AI
Correct answer: 4.
Heat is energy in transit — the energy that flows between two bodies because of a temperature difference (flows spontaneously from the hotter to the colder).
Clarifications:
- Temperature is a measure of the average kinetic energy of particles (option 2).
- Internal energy is the total microscopic energy (kinetic + potential) of a substance (related to option 3).
- Specific heat capacity (or the calorie definition for water) describes how much heat is needed to raise 1 g (or 1 kg) of a substance by 1°C (option 1), but that is not the definition of heat itself.
- Heat is measured in joules and is transferred by conduction, convection, or radiation.
Heat is energy in transit — the energy that flows between two bodies because of a temperature difference (flows spontaneously from the hotter to the colder).
Clarifications:
- Temperature is a measure of the average kinetic energy of particles (option 2).
- Internal energy is the total microscopic energy (kinetic + potential) of a substance (related to option 3).
- Specific heat capacity (or the calorie definition for water) describes how much heat is needed to raise 1 g (or 1 kg) of a substance by 1°C (option 1), but that is not the definition of heat itself.
- Heat is measured in joules and is transferred by conduction, convection, or radiation.
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