Definitions in Equilibrium Chapter of Chemistry

1. Equilibrium

• It is defined as the state of a process in which the properties like temparature, pressure, concentration of the system do not show any change with the passage of time.

2. Physical Equilibrum

• If the opposing processes involve only physical changes, the equilibrium is called Physical Equilibrum.

3. chemical equilibrium

• If the opposing processes involve chemical changes, i.e. the opposing processes are chemical reactions, It is called chemical equilibrium.

4. Solubility

• The amount of the solid in grams that dissoves in 100 g of the solvent to form a saturated solution at a particular temperature is called the solubility of that solid in the given solvent at that temperature.

5. Henry's Law

• The mass of a gas dissolved in a given mass of a solvent at any temperature is directly proportional to the pressure of the gas above the solvent, i.e.
  m ∝ p or m = kp
  where k is a constant of proportionality and is called "Henry's constant".
  It's value depends upon
  - Nature of the gas,
  - Nature of the Liquid and
  - Temperature.