March 18, 2011 | FJ Gaylor

Is It Graham’s Law?

Students in a chemistry lecture hall learn about the effusion of gases. Photo by FJ Gaylor

<p>These students in a chemistry lecture hall are learning about the effusion of gasses. Graham's law of effusion was formulated by Scottish physical chemist Thomas Graham who found experimentally that the rate of effusion of a gas is inversely proportional to the square root of the mass of its particles. Photo by FJ Gaylor</p>
Students in a chemistry lecture hall learn about the effusion of gases. Graham's law of effusion was formulated by Scottish physical chemist Thomas Graham, who found experimentally that the rate of effusion of a gas is inversely proportional to the square root of the mass of its particles. Photo by FJ Gaylor