PHYSICAL QUANTITY

Quantity of substance: formulas and units of measurement

Quantity of substance: symbol ν, unit mole. Formulas and explanations for MCT and thermodynamics.

νmole

KEY CONNECTIONS

Formulas

ν = m / M

ν = N / Nₐ

N = νNₐ

pV = νRT

U = (3/2)νRT

Note: The internal energy formula U = 3νRT/2 is given for a monatomic ideal gas.

NOTATION

: Quantity of a substance is a measure of the number of particles in a sample of a substance.
: Mass is a scalar physical quantity that is a measure of the inertia of a body.
: Molar mass is the mass of one mole of a substance.
: Particle count is the number of molecules, atoms, or other particles in a system.
: Avogadro's constant is the number of particles in one mole of a substance.
: Pressure is the force per unit surface area.
: Volume is the size of the area of space occupied by a body.
: The universal gas constant is the coefficient of connection between the parameters of an ideal gas.
: Temperature is a measure of the thermal state of the body.
: Internal energy is the energy of movement and interaction of particles of matter.

THEORY

PRACTICE

Topics in order: the concepts, quantities and formulas of a lesson with explanations and examples.

Statements, answer options and a detailed walkthrough for every topic of the course.

A 10-question check-up, exercises with answer checking, and saved progress.