CHEM 0N01 Chapter Notes - Chapter 5: Endothermic Process, Thermodynamics, Atomic Orbital
24 May 2016
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Document Summary
Thermochemistry: the study of heat released or required by a chemical reaction. Energy is released ~ [reactants -> products + energy: system temperature decreases, surrounding temperature increases. Energy is absorbed ~ [reactants + energy -> products: system temperature increases, surrounding temperature decreases. Law of conservation of energy: total energy in the universe is constant [ euniverse =0, energy can be neither created nor destroyed, energy can be transferred from one substance to another, energy can be converted into various forms. Energy stored in a substance: chemical energy, energy stored in chemical bonds. Attractive forces outweigh repulsive forces = low. Potential energy: nuclear energy, in the neutrons the protons try to repulse each other against the strong nuclear force. Energy due to motion: vibrational, rotational. Heat: [symbol: q ~ unit: j joules] Transfer for kinetic energy spontaneously from warmer to cooler objects: closing the door to prevent cold air from entering ~ reality: the hot air is leaving.
