J+Sams+and+R+Weidner+Energy+Wiki+Ideal

=Ideal Gas Law=

The Ideal Gas Law is an equation, written in 1834 by Emil Clapeyron that pertains to a hypothetical perfect, or ideal, gas. The equation is:

PV = nRT

P = absolute pressure of the gas V = volume of the gas n = number of moles of gas R = 8.314 472 J·mol−1·K−1 T = absolute temperature

An example (found at [|http://dbhs.wvusd.k12.ca.us/webdocs/GasLaw/Gas-Ideal.html)] would be:

A sample of dry gas weighing 2.1025 grams is found to occupy 2.850 L at 22.0°C and 0.9737 atm. How many moles of the gas are present?

In this case, you would be solving for "n", or or number of moles of gas. To do this, you must simply plug the given values into the ideal gas law as follows:

(0.9737 atm) (2.850 L) = (n) (0.08206 L atm / mol K) (295.0 K)

First, .9737 x 2.850 is 2.775045

Next, .08206 x 295 is 24.2077

Now the equation is 2.775045 = n x 24.2077. Next, you divide both sides by 24.2077 giving you the value of n.

2.775045 / 24.2077 = n = 0.11463480628064624065896388339247

Emil Clapyeron, doing some reading.

J Sams and R Weidner Gas Law Wiki