CHEM 122H Lecture Notes - Lecture 2: Thermodynamics, Calorie, Viscosity
21 Mar 2016
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Document Summary
The viscosity of a liquid is its resistance to low, the higher the viscosity, the more sluggish the low. Thermodynamics: the study of the transformaions of energy from one form into another. The surroundings in which these reacions happen is called the system. An open system can exchange both mater and energy with the system. A closed system can only exchange energy such as heat with its surroundings. An isolated system has no contact with its surrounding system. In thermodynamics, work is the process of achieving moion against against an opposing force. The internal energy of a system is its capacity to do work, and it can be changed by transferring energy to or from the surroundings as heat. Exothermic is usually negaive, endothermic are usually posiive. The nutriional calorie, calorie, is equal to a kilocalorie or one thousand calories (lower-case c. ) when energy is transferred as heat and no other processes occur, the change in internal energy, u=q.
