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The absolute entropy of a substance in its standard state at 298 K.

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Indicators

For acid-base titrations, organic compounds that exhibit different colors in solutions of different acidities, used to determine the point at which reaction between two solutes is complete.

Heterogeneous Catalyst

A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.

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Mechanism

The sequence of steps by which reactants are converted into products.

Potential Energy

Energy that matter possesses by virtue of its position, condition or composition.

Amide

Compound containing the O-C-N group.Compound that can be considered a derivative of ammonia in which one or more hydrogens are replaced by a alkyl or aryl groups.

 

Dipole Moment

The product of the distance separating opposite charges of equal magnitude of the charge, a measure of the polarity of a bond or molecule, a measured dipole moment refers to the dipole moment of an entire molecule.

Allotropic Modifications (Allotropes)

Different forms of the same element in the same physical state.

Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

Hydrometer

A device used to measure the densities of liquids and solutions.