CHEM 1106 Lecture Notes - Lecture 6: Mining Accident, Calcium Chloride, Thermodynamics
3 Apr 2016
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Exothermic reactions release heat energy to the surroundings. Dissolving compounds such as calcium chloride (cacl2) is an exothermic process, not an exothermic reaction. Endothermic reactions absorb heat energy from the surroundings. First law of thermodynamics (also known as the law of conservation of. However, it can be converted from one for to another. A machine cannot create more energy than it takes in. There is no such thing as a perpetual motion device, which some think can produce more energy than they consume. They would just continue in motion without external energy input. Energy lows spontaneously from hotter objects toward colder objects. You have to look at the object and its surroundings. Eventually, energy tends to be converted to less and less useful forms. Entropy is a measure of dispersal of energy. For all spontaneous processes, the entropy of the universe is increasing. Things as a whole will become more disordered, dispersed, and random.
