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The temperature at which liquid and solid coexist in equilibrium, also the freezing point.

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Electrochemistry

Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.

Electron Deficient Compounds

Compounds that contain at least one atom (other than H) that shares fewer than eight electrons.

Coordinate Covalent Bond

A covalent bond in which both shared electrons are donated by the same atom, a bond between a Lewis base and a Lewis acid.

Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.

Calorimeter

A device used to measure the heat transfer between system and surroundings.

Unsaturated Hydrocarbons

Hydrocarbons that contain double or triple carbon-carbon bonds.

Electron Affinity

The amount of energy absorbed in the process in which an electron is added to a neutral isolated gaseous atom to form a gaseous ion with a 1- charge, has a negative value if energy is released.

Heterogeneous Equilibria

Equilibria involving species in more than one phase.

Chemical Equation

Description of a chemical reaction by placing the formulas of the reactants on the left and the formulas of products on the right of an arrow.

yttria

Y2O3: A white, water-insoluble powder, Y2O3, used chiefly in incandescent gas and acetylene mantles.