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Reaction of a substance with water.

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Nitrogen Cycle

The complex series of reactions by which nitrogen is slowly but continually recycled in the atmosphere, lithosphere and hydrosphere.

 

Differential Thermal Analysis (DTA)

A technique for observing the temperature, direction, and magnitude of thermally induced transitions in a material by heating/cooling a sample and comparing its temperature with that of an inert reference material under similar conditions.

Alpha (a) Particle

Helium ion with 2+ charge, an assembly of two protons and two neutrons.

Partial Pressure

The pressure exerted by one gas in a mixture of gases.

Raoult's Law

The vapor pressure of a solvent in an ideal solution decreases as its mole fraction decreases.

Hydration Energy

The energy change accompanying the hydration of a mole of gase and ions.

Hydration

Reaction of a substance with water.

Hydrate

A solid compound that contains a definite percentage of bound water.

Binary Compound

A compound consisting of two elements, may be ionic or covalent.

Effective Collisons

Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.