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Experimentally Determining the Molecular Weight of Carbon Dioxide Using a Mylar Balloon
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Abstract
The molar mass of carbon dioxide was experimentally determined using a Mylar balloon. Mylar balloons are lightweight, have a fixed definite volume, and require minimal additional pressure for inflation. Using the Ideal Gas Equation, the number of moles of air in the balloon was calculated. The molar mass of air was calculated using the percentages of the individual gases. Having these two values, the mass of air in the balloon, also known as the buoyant force of air, was calculated. The balloon was filled with carbon dioxide and the observed mass of the carbon dioxide was added to the mass of the displaced air for the true mass of carbon dioxide. Having the number of moles the balloon holds and the mass of carbon dioxide, the molar mass of carbon dioxide was calculated.
Keywords (Audience):
High School / Introductory ChemistryKeywords (Domain):
Laboratory InstructionKeywords (Feature):
Cost-Effective TeacherKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
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This article has been cited by 4 ACS Journal articles (4 most recent appear below).
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Applying Chemical Potential and Partial Pressure Concepts To Understand the Spontaneous Mixing of Helium and Air in a Helium-Inflated Balloon
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Jee-Yon Lee and Hee-Soo Yoo , Jong Sook Park , Kwang-Jin Hwang and Jin Seog KimJournal of Chemical Education2005 82 (2), 288In developing this laboratory, our initial motivation for the analysis of gases in a balloon was to answer simple and basic questions, such as, Why does a helium-charged balloon left in the air always drop in a few days? Is leakage of helium the only ...
Unknown Gases: Student-Designed Experiments in the Introductory Laboratory
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John Hanson and Tim HoytJournal of Chemical Education2002 79 (7), 845Introductory students design and carry-out experimental procedures to determine the identity of three unknown gases from a list of eight possibilities: air, nitrogen, oxygen, argon, carbon dioxide, helium, methane, and hydrogen. Although this is initially ...
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- Received: August 03, 2009
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