where p is gas pressure, V is volume, is the number of moles, R is the universal gas constant (= 8.3144 j/(oK mole)), and T is the absolute temperature. The first law of thermodynamics, the conservation of energy, may be written in differential form as. dq = du + p dV.
Definition of DIAMOND for Kids. 1. : a very hard mineral that is a form of carbon, is usually nearly colorless, and is used especially in jewelry. 2. : a flat figure {loz} like one of the surfaces of certain cut diamonds.
There is still considerable uncertainty to the origin of diamond. Like ruby, diamond is a gemstone whose true geological source has been obscured by volcanic activity. The most widely accepted theory is that it was formed at greater depths in the earth's crust, or even mantle, at very high pressures and temperatures.