CM-UY 1004 Lecture Notes - Lecture 10: Radiant Energy, Chemical Energy, Endothermic Process
16 Oct 2017
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Document Summary
Gas is composed of molecules separated from each other by distances greater than their own dimensions molecules can be considered points; psses mass negligible volume. Gas molecules are in constant motion in random directions. collisions are perfectly. Gas molecules exert neither attractive nor repulsive forces (f for gases but ideal) Average kinetic energy of molecules is proportional to the temp of the gas in kelvins. Ideal gas law fails when molecules are together (form liquid) Energy is the capacity to do work. Radiant energy: comes from sun and is earth"s primary energy source. Thermal energy: energy associated with random motion of atoms and molecules. Chemical energy: energy stored within bonds of chemical substances. Potential energy: energy available by virtue of an object"s position. Heat: transfer of thermal energy between 2 bodies at different temperatures. Thermochemistry: study of heat change in chemical reactions. Q is the heat exchange between system and surroundings.
