Question

Define the Graham's law of diffusion​

Answer 1

Answer:

noun Physical Chemistry. the principle that at a given temperature and pressure the rate of diffusion of a gas is inversely proportional to the square root of its density.

Answer 2

Graham's law of diffusion was formulated by Scottish physical chemist Thomas Graham in 1848.Graham found experimentally that the rate of effusion of a gas is inversely proportional to the square root of the molar mass of its particles.This formula is :-

{\displaystyle {{\mbox{Rate}}_{1} \over {\mbox{Rate}}_{2}}={\sqrt {M_{2} \over M_{1}}}}{{\mbox{Rate}}_{1} \over {\mbox{Rate}}_{2}}={\sqrt {M_{2} \over M_{1}}},

Rate1 is the rate of effusion for the first gas. (volume or number of moles per unit time).

Rate2 is the rate of effusion for the second gas.

M1 is the molar mass of gas 1

M2 is the molar mass of gas 2.

Graham's law states that the rate of diffusion or of effusion of a gas is inversely proportional to the square root of its molecular weight.

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