![]() ![]() Specific heat is closely related to the concept of heat capacity. The temperature change ( Δ T Δ T ) is the same in units of kelvins and degrees Celsius (but not degrees Fahrenheit). The specific heat c is a property of the substance its SI unit is J/(kg ⋅ ⋅ K) or J/(kg ⋅ ⋅ ☌ ☌ ). ![]() The specific heat is the amount of heat necessary to change the temperature of 1.00 kg of mass by 1.00 ✬. The symbol c stands for specific heat, and depends on the material and phase. Where m is the mass of the substance and Δ T is the change in its temperature, in units of Celsius or Kelvin. Experiments show that the heat transferred to or from a substance depends on three factors-the change in the substance’s temperature, the mass of the substance, and certain physical properties related to the phase of the substance. One of the major effects of heat transfer is temperature change: Heating increases the temperature while cooling decreases it. There is no net heat transfer once the temperatures are equal because the amount of heat transferred from one object to the other is the same as the amount of heat returned. If two objects at different temperatures are brought in contact with each other, energy is transferred from the hotter object (that is, the object with the greater temperature) to the colder (lower temperature) object, until both objects are at the same temperature. We learned in the previous section that temperature is proportional to the average kinetic energy of atoms and molecules in a substance, and that the average internal kinetic energy of a substance is higher when the substance’s temperature is higher. Heat Transfer, Specific Heat, and Heat Capacity Check prior knowledge of conduction and convection. Review concepts of heat, temperature, and mass. ![]()
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