Lecture in Heat

This is the lecture in Heat as one topic in Applied Physics subject in taking up Engineering Courses.

Convert from joules to calories and kilocalories and vice versa.
Distinguish between the concepts of temperature and heat.
Explain what is meant by specific heat, latent heat of fusion, and latent heat of vaporization.
Apply the law of conservation of energy to problems involving calorimetry.
Distinguish the three ways that heat transfer occurs: conduction, convection, and radiation.
Solve problems involving the rate of heat transfer by convection and radiation.

Internal energy U refers to the total energy of all molecules in an object. For an ideal monatomic gas,
Heat is the transfer of energy from one object to another due to a temperature difference. Heat can be measured in joules or in calories.
Specific heat of a substance is the energy required to change the temperature of a fixed amount of matter by 1° C.
In an isolated system, heat gained by one part of the system must be lost by another.
Calorimetry measures heat exchange quantitatively.
Phase changes require energy even though the temperature does not change.
Heat of fusion: amount of energy required to melt 1 kg of material.
Heat of vaporization: amount of energy required to change 1 kg of material from liquid to vapor.
Heat transfer takes place by conduction, convection, and radiation.
In conduction, energy is transferred through the collisions of molecules in the substance.
In convection, bulk quantities of the substance flow to areas of different temperature.
Radiation is the transfer of energy by electromagnetic waves.

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