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Heat is a type of energy transfer that is caused by a temperature difference, and it can change the temperature of an object. As we learned earlier in this chapter, heat transfer is the movement of energy from one place or material to another as a result of a difference in temperature.
- 1.8: Temperature and Heat (Summary)
The rate of heat transfer P (energy per unit time) is...
- 1.10: Temperature and Heat (Answer)
Turn the thermostat down. To have the house at the normal...
- 1.8: Temperature and Heat (Summary)
The rate of heat transfer P (energy per unit time) is proportional to the temperature difference Th −Tc and the contact area A and inversely proportional to the distance d between the objects. Convection is heat transfer by the macroscopic movement of mass.
Turn the thermostat down. To have the house at the normal temperature, the heating system must replace all the heat that was lost. For all three mechanisms of heat transfer, the greater the temperature difference between inside and outside, the more heat is lost and must be replaced.
Highlights. Section Learning Objectives. By the end of this section, you will be able to do the following: Explain that temperature is a measure of internal kinetic energy. Interconvert temperatures between Celsius, Kelvin, and Fahrenheit scales. Section Key Terms. Temperature. What is temperature?
Heat is the total energy of the motion of the molecules of a substance, whereas temperature refers to the measure of the average energy of the motions of the molecules in the substance. The heat is dependent on factors like the speed of the particles, the size of the particles and the number of particles, etc.
Section Learning Objectives. By the end of this section, you will be able to do the following: Explain heat, heat capacity, and specific heat. Distinguish between conduction, convection, and radiation. Solve problems involving specific heat and heat transfer. Section Key Terms. conduction. convection. heat capacity. radiation. specific heat.
The equation that relates heat, specific heat capacity, mass, and change in temperature is where is the heat (measured in calories), is the mass (measured in grams), is the specific heat capacity, and is the temperature change (measured in degrees Celsius).
