How is the temperature of an object related to the amount of heat it absorbs or gives off? We take the following definition: 1 calorie = amount of heat required to raise the temperature of 1 gram of water by 1.0°C (specifically from 14.5°C to 15.5°C) For example, if the temperature of 100 grams of water increases by 30°C. the water has absorbed 3,000 calories of heat, or Q = 3,000 cal, where Q denotes amount of heat, and cal stands for calories. Exercises: 1. How much heat is absorbed if the temperature of 50 grams of water increases by 15°C? 2. As 1 kg of water is heated from 28°C to 95°C, how much heat is absorbed by the water?
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
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