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The purpose of this experiment was to determine the molar mass of carbon dioxide (CO2) experimentally.

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  • Essay length: 1354 words
  • Submitted: 10/12/2010
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International Baccalaureate Chemistry

The first 200 words of this essay...

Determining the molar mass of a gas

Experiment date: 13/10/10

Performed by: Hannah Chan & Alexander Forman

The purpose of this experiment was to determine the molar mass of carbon dioxide (CO2) experimentally. A simple calculation using the periodic table would provide the correct answer for the molar mass of carbon dioxide, however, one can also conduct an experiment and try to reach the accepted value.

Introduction: The ideal gas law equation(PV = nRT) defines the relationships between pressure (P), volume (V), number of moles (n), and temperature (T) for any ideal gas sample.

R is the ideal gas constant, defines as 0.0821 L · atm/K · mol. Therefore P must be expressed in atmospheres (atm), V in liters (L), n in moles (mol), and T in Kelvin (K). Almost all experimental conditions correspond with the ideal gas law equation. Only when the gas pressure is several atmospheres or higher does the behaviour deviate from the equation. In order to calculate the molar mass of CO2, one must first be familiar with this equation.

Hypothesis: It was expected that the mass would be approximately 44 g mol-1.

Materials:

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