States of Matter - Intermolecular Forces - Gases
Chapter 12: states of matter
Gases expand, diffuse, exert pressure, and can be compressed because they are in a low-density state consisting of tiny constantly-moving particles. Intermolecular forces, including dispersion forces, dipole-dipole forces, and hydrogen bonds, determine a substance's state at a given temperature. The particles in solids and liquids have a limited range of motion and are not easily compressed. Matter changes phase when energy is added or removed.
Chapter 13: gases
For a fixed amount of gas, a change in one variable, pressure, temperature, or volume, affects the other two. The ideal fas law relates the number of particles to pressure, temperature, and volume. When gases react, the coefficients in the balanced chemical equation represent both molar amounts and relative volumes.
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