TY - JOUR
T1 - Diffusion of Gases into Air
T2 - A Simple Small-Scale Laboratory Activity
AU - Kallepalli, Samaya
AU - Johnson, Lydia
AU - Mattson, Bruce
N1 - Funding Information:
We gratefully acknowledge support from Creighton University, Department of Chemistry and Biochemistry. We recognize Creighton student Laura Cogua for her preliminary experiments with gas diffusion from syringes and to Dr. Mark Freitag (Creighton University) for meaningful discussions.
Publisher Copyright:
© 2021 American Chemical Society and Division of Chemical Education, Inc.
PY - 2021/10/12
Y1 - 2021/10/12
N2 - Thomas Graham discovered the law that bears his name while studying gas diffusion into air and other gases. He also found that the same relationship held with gas effusion, the movement of gases through a pinhole into a vacuum. Modern understanding of diffusion and effusion is based on kinetic-molecular theory, and it is generally accepted that Graham's law as originally stated holds for effusion. Diffusion is more complicated, involving intermolecular collisions and composition gradients. This article describes a simple laboratory activity in which diffusion of gases into air though an open syringe is studied over time. The activity could be adapted and modified into an inquiry-based independent study activity or undergraduate research project.
AB - Thomas Graham discovered the law that bears his name while studying gas diffusion into air and other gases. He also found that the same relationship held with gas effusion, the movement of gases through a pinhole into a vacuum. Modern understanding of diffusion and effusion is based on kinetic-molecular theory, and it is generally accepted that Graham's law as originally stated holds for effusion. Diffusion is more complicated, involving intermolecular collisions and composition gradients. This article describes a simple laboratory activity in which diffusion of gases into air though an open syringe is studied over time. The activity could be adapted and modified into an inquiry-based independent study activity or undergraduate research project.
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U2 - 10.1021/acs.jchemed.1c00657
DO - 10.1021/acs.jchemed.1c00657
M3 - Article
AN - SCOPUS:85115981551
VL - 98
SP - 3258
EP - 3262
JO - Journal of Chemical Education
JF - Journal of Chemical Education
SN - 0021-9584
IS - 10
ER -