PHYSICAL QUANTITY

Temperature: formulas and units of measurement

Temperature: symbol T, t, unit K, °C. Formulas and explanations for MCT and thermodynamics.

T,\ t

T, t

\text{K},\ ^\circ\text{C}

kelvin, degree Celsius

KEY CONNECTIONS

Formulas

T = 273 + t

T = 273 + t

⟨ E ⟩ = \frac{3}{2} k T

⟨E⟩ = (3/2)kT

p = n k T

p = nkT

v_{kv} = \frac{3 R T}{M}

vkv = √(3RT / M)

p V = \frac{m}{M} R T

pV = (m/M)RT

\frac{p V}{T} = const

pV / T = const

\frac{p}{T} = const (V = const)

p / T = const at V = const

\frac{V}{T} = const (p = const)

V / T = const at p = const

Note: The temperature increments are equal: ΔT in Kelvin is numerically equal to Δt in degrees Celsius.

NOTATION

$T$: 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.
$k$: Boltzmann's constant is the coefficient of correlation between temperature and particle energy.
$p$: Pressure is the force per unit surface area.
$n$: Concentration is the number of particles per unit volume.
$v_{\text{kv}}$: Root mean square velocity is a characteristic of the thermal motion of gas particles.
$R$: The universal gas constant is the coefficient of connection between the parameters of an ideal gas.
$M$: Molar mass is the mass of one mole of a substance.
$V$: Volume is the size of the area of space occupied by a body.
$m$: Mass is a scalar physical quantity that is a measure of the inertia of a body.

THEORY

PRACTICE