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Avagadro

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by

Liza Frazier

on 2 October 2012

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Transcript of Avagadro

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli Amedeo Carlo Avogadro From Turin, Italy
Lived from 1776-1856
Had six children and very religious
Originally a lawyer but became more interested in natural sciences
Became a physicist and mathematician
Published many articles including articles specifying about his hypothesis and gas densities.
Differentiated between atoms and molecules
Some achievements include: Avogadro's law and hypothesis
Later became the first chair of mathematical physics at Turin University. Background At the same temperature and pressure, the volume of a gas is directly proportional to its number of particles
1mol= 22.4 L when at STP (Standard Temperature and Pressure- 0˚C and 1atm)
Conversion always works when the conditons are at STP, but when the conditons are not perfect, then use ideal gas law.
From the hypothesis came Avogadro's law and the Ideal Gas Law Hypothesis Avogadro's Law and Ideal Gas Law Sources: Real Life Applications At constant pressure and temperature, the volume of the gas is directly proportional of the number of moles in that gas.
V/n=K "v" is volume, "n" is number of particles, and "k" is the constant
As number of particles increase in a gas, the volume increases.
Ideal gas Law: PV=nRT is used when Avogadro's law can't be applied Yeast (levening agent) breaks down carbs from flour and sugar
changes them to Carbon dioxide (CO2) and ethonol (C2H6O)
When CO2 is released it makes bubbles, as number of particales increases in the bubbles (CO2), the volume of the bubbles increases, therefore the dough rises. Baking Bread Blowing up a Balloon/ Breathing As a person blows into a balloon, the number of particles in the balloon increases and so the volume increases as well.
As we inhale, our lungs expand (oxegen particles coming in)
when we exhale our lungs contract because the carbon dioxide is leaving 6.0221415e23= 1mol
the mole was named after Avogadro, he did not actually create it.
concept created long after he died
a mole is a counting number--counts the number atoms or molecules Avogadro's Number Works Cited
"Amedeo Avogadro Biography." About.com Chemistry. N.p., n.d. Web. 24 Sept. 2012. <http://chemistry.about.com/od/famouschemists/a/avogadro.htm>."Avogadro's Hypothesis and Law." ThinkQuest. Oracle Foundation, n.d. Web. 23 Sept. 2012. <http://library.thinkquest.org/12596/avogadro.html>."ChemTeacher." ChemTeacher. N.p., n.d. Web. 23 Sept. 2012. <http://chemteacher.chemeddl.org/services/chemteacher/index.php?option=com_content>."An Exact Value for Avogadro's Number." û American Scientist. N.p., n.d. Web. 26 Sept. 2012. <http://www.americanscientist.org/issues/pub/an-exact-value-for-avogadros-number>.N.p., n.d. Web. 26 Sept. 2012. <http://image.shutterstock.com/display_pic_with_logo/5483/5483,1186917410,2/stock-photo--years-old-boy-blowing-up-balloon-isolated-on-white-4517689.jpg>.N.p., n.d. Web. 26 Sept. 2012. <http://sourdough.com/bread/resize/blogs/comp_4-780x585.jpg>.N.p., n.d. Web. 26 Sept. 2012. <http://www.pirates-cave.com/cannon%20D407.jpg>."The Number's History." The Number's History. N.p., n.d. Web. 26 Sept. 2012. <http://www.moleday.org/htdocs/numhist.html>
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