PHYSICAL QUANTITY

Molecular concentration: formulas and units of measurement

Molecular concentration: symbol n, unit m⁻³. Formulas and explanations for MCT and thermodynamics.

nn\text{м}^{-3}reciprocal cubic metre

KEY CONNECTIONS

Formulas

n=\frac{N}{V}n = N / V

p=nkTp = nkT

p=\frac{2}{3}n\left\langle E\right\ranglep = (2/3)n⟨E⟩

p=\frac{1}{3}m_0n\left\langle v^2\right\ranglep = (1/3)m₀n⟨v²⟩

\rho=m_0nρ = m₀n

NOTATION

n: Concentration is the number of particles per unit volume.
N: Particle count is the number of molecules, atoms, or other particles in a system.
V: Volume is the size of the area of space occupied by a body.
p: Pressure is the force per unit surface area.
k: Boltzmann's constant is the coefficient of correlation between temperature and particle energy.
T: Temperature is a measure of the thermal state of the body.
E: The average kinetic energy of a particle is the average energy of thermal motion of one particle.
m_0: The mass of one particle is the mass of an individual molecule or atom of a substance.
v: Velocity is the rate and direction of change of a body's position.
\rho: Density is the mass of a substance per unit volume.

THEORY

PRACTICE