PHYSICAL QUANTITY

Amount of substance: formulas and units of measurement

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

\nuν\text{моль}mole

KEY CONNECTIONS

Formulas

\nu=\frac{m}{M}ν = m / M

\nu=\frac{N}{N_A}ν = N / Nₐ

N=\nu N_AN = νNₐ

pV=\nu RTpV = νRT

U=\frac{3}{2}\nu RTU = (3/2)νRT

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

NOTATION

\nu: Quantity of a substance is a measure of the number of particles in a sample of a substance.
m: Mass is a scalar physical quantity that is a measure of the inertia of a body.
M: Molar mass is the mass of one mole of a substance.
N: Particle count is the number of molecules, atoms, or other particles in a system.
N_A: Avogadro's constant is the number of particles in one mole of a substance.
p: Pressure is the force per unit surface area.
V: Volume is the size of the area of space occupied by a body.
R: The universal gas constant is the coefficient of connection between the parameters of an ideal gas.
T: Temperature is a measure of the thermal state of the body.
U: Internal energy is the energy of movement and interaction of particles of matter.

THEORY

PRACTICE