Avogadrns Law The volume M of a gas held at constant pressure and temperature

# Avogadrns law the volume m of a gas held at constant

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Avogadrn's Law: The volume M of a gas held at constant pressure and temperature is proportional to the number of moles (n) of the gas. vccn CI V=kn(8) -J
Perfect Gas [aw: These three laws can be combined to give an equation that describes a gas in terms of its pressure (P), volume (v), absolute temperature o) and the number of moles (n). - PV = nRT (9) where R is the universal gas constant and has a value of 0-82051atm mole -r k-r' ( = o - o&e oS I alrn,.role't lx-r Equation (6) will form the basis of the following experiment in which the volumes and temperatures of a fixed amount of gas will be collcted for several different conditions and analyzed to show tfruittu quantity €) o u constant. BGERIMENTAL PROCEDUBE '1. Obtain the following items: transparent or translucent drinking ry *iflt an inside diameter of approximately 0-4cm, foS4:clgig& a votive candle(16" by 2 inches),i:e, a t!er..4gg!eL a ruler Styrofoam =gs and u bSgj]ip. Ltra tr* in:teacl af, wa*' Fill one Styrofoam cup with water within two inches of the top and add a few drops of green or blue food coloring. Cut aff aY inch section of the drinkmg straw. Light the candle and let liquid collect around the wick. Lct a drop of moltel wax fall onto a clearL cool surface. While the wax is still pliable transfer it to the end of the straw forming a temporary plug' .+c 2.
4. Push.the semi solid wax down into the open end of the straw while smoothing it with your thumb. 5. Place the binder clip onto the edge of the cup with the dyed vrater. 6. Lower the ear of the clip so that it is pointing tovr,ards the solution. Slide the straw with the open end down, under the lowered ear of the clip. 7- Light the candle and let a puddle of molten wax form around the wick of the candle. Carefully tilt it so that the molten wax will drip onto the end of the straw, and hold it over the wax in the straw. Fill in the plug end until the liquid wax starb to overflow.

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• Fall '08
• TANIZAKI
• Thermodynamic temperature, Boltzmann constant