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The amount of heat required to raise the temperature of one gram of water from 14.5°C to 15.5°C. 1 calorie = 4.184 joules.

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Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.

Hydrogen-Oxygen Fuel Cell

Fuel cell in which hydrogen is the fuel (reducing agent) and oxygen is the oxidizing agent.

 

Dynamic Equilibrium

An equilibrium in which processes occur continuously, with no net change. When two (or more) processes occur at the same rate so that no net change occurs.

Alpha (a) Particle

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

Lone Pair

Pair of electrons residing on one atom and not shared by other atoms, unshared pair.

D -Transition elements (metals)

B Group elements except IIB in the periodic table, sometimes called simply transition elements EX. Fe, Ni, Cu, Ti .
For further information see Metals.

Electrolysis

Process that occurs in electrolytic cells.

Critical Point

The combination of critical temperature and critical pressure of a substance.

Fossil Fuels

Substances consisting largely of hydrocarbons, derived from decay of organic materials under geological conditions of high pressure and temperature (metamorphism) include coal, petroleum, natural gas, peat and oil shale.  For further information see Fuel Chemistry

Henry's Law

The pressure of the gas above a solution is proportional to the concentration of the gas in the solution.