The Ideal and Combined Gas Laws
The last two gas laws are the combined and ideal laws. The combined gas law takes each of the previous three laws (Boyle's, Charles, and Gay-Lussac's) and puts them together in a single equation. This is useful when none of the three conditions (pressure, volume, temperature) are being held constant. The ideal gas law is useful when dealing with a given amount (in moles) of a gas.
Essential concepts: Energy, heat, enthalpy, activation energy, potential energy, exothermic, endothermic.
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