Biophysics and Physics Lecture Flashcards

Dissociation coefficient $\alpha$

A dimensionless physical quantity representing the ratio of the number of dissociated molecules to the total number of dissolved molecules.

Strong electrolytes

Electrolytes that are fully dissociated, where the dissociation coefficient $\alpha$ is equal to $1$.

Second-order conductors

Electrolytic solutions where the passage of electric current is achieved by the migration of positive and negative ions.

Electrolytic dissociation

A spontaneous phenomenon, independent of an external electric field, where molecules of a dissolved substance decompose into positive and negative ions.

Stokes' law

A physical law describing the viscous resistance force exerted by a liquid on moving ions, which is proportional to the ion's radius and velocity.

Solvation

The phenomenon where polar water molecules distribute themselves around ions in a solution, affecting the ion's mobility and effective diameter.

Linear expansion coefficient $\alpha$

The ratio between the elongation of a body and the product of its initial length and temperature variation, measured in $K^{-1}$.

Volume expansion coefficient $\gamma$

The relative variation of the volume of a body per degree of temperature change; for