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Combined Gas Law Experiment

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Raven Nuñez

on 7 April 2014

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Transcript of Combined Gas Law Experiment

Combined Gas Law Experiment
And Kinetic Molecular Theory Of Gases

Kinetic Molecular Theory Law Of Gases
There are five postulates :
A gas consists of a collection of small particles traveling in straight-line motion and obeying Newton's Laws.
The molecules in a gas occupy no volume (that is, they are points)
Collisions between molecules are perfectly elastic (that is no energy is gained or lost or lost during the collision).
There are no attractive or repulsive forces between the molecules.
The average kinetic energy of molecules is
3kT/2
. (T is the absolute temp. and k is the Boltzmann constant.
Water Raise Experiment

Citations
-http://www.calctool.org/CALC/chem/c_thermo/ideal_gas

-http://chemwiki.ucdavis.edu/Physical_Chemistry/Physical_Properties_of_Matter/Phases_of_Matter/Gases/Gas_Laws
What you will need:
-Candle.
-Glass.
-Water.
-Bowl.
-Fire.
How does the experiment show or explain the Ideal Gas Law?

-The warm air trapped under the glass cools once the candle goes out, it contracts, drawing the water into the glass. The air volume change follows Charles' Law, a subset of the ideal gas law.
Raven Nunez, Lizette Salgado, Paul Ramirez, & Pablo Moreno
The combined gas law involves pressure, volume, and temperature. Usually involves a change in gas
Some math
-6.2 liters of an ideal gas are contained at 3.0 atm and 37 °C. How many moles of this gas are present?

(We convert our temperature to Kalvin by adding 273) Our equation would look something like this by using PV/RT to find number of moles:
(P)3.0 atm (V)6.2L=.08 L atm (R) 310 K (T)
We solve that as a normal equation and the result is .75 mol.
Combind Gas Law
Full transcript