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Chemistry questions.rn1.what's heat transfer?rn2. Explain clearly the following termsrn1.conductionrn2.convectionrn3.radiation
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1. What is heat transfer?
Heat transfer is the movement of thermal energy from one object or region to another. It can occur in three ways: conduction, convection, and radiation.
2. Explain clearly the following terms
1. Conduction
Conduction is the transfer of heat energy between two objects in contact with each other. It occurs when there is a difference in temperature between the two objects, and the heat flows from the hotter object to the colder object. For example, when you touch a hot stove, heat from the stove is transferred to your hand through conduction.
2. Convection
Convection is the transfer of heat energy by the movement of a fluid. It occurs when a fluid is heated, causing it to expand and become less dense. The less dense fluid rises, and the cooler, denser fluid sinks. This creates a convection current, which carries heat from the hotter part of the fluid to the cooler part. For example, convection currents in the Earth's atmosphere cause warm air to rise and cool air to sink, creating wind.
3. Radiation
Radiation is the transfer of heat energy through electromagnetic waves. It does not require a medium, so it can occur in a vacuum. For example, heat from the sun travels to the Earth through radiation.
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