PHYSICAL QUANTITY

Quantity of substance: formulas and units of measurement

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

\nu

\text{mol}

mole

KEY CONNECTIONS

Formulas

ν = \frac{m}{M}

ν = m / M

ν = \frac{N}{N _{A}}

ν = N / Nₐ

N = ν N_{A}

N = νNₐ

p V = ν R T

pV = νRT

U = \frac{3}{2} ν R T

U = (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