Thermodynamics & Statistical Physics
55 terms · page 3 of 3
Thermal Radiation
Thermodynamics & Statistical Physics
W
The emission of electromagnetic energy from matter due to thermal agitation of its charged constituent particles.
P = ε σ A T⁴ (Stefan-Boltzmann Law)
Thermal Stress
Thermodynamics & Statistical Physics
Pa (N/m²)
Mechanical stress developed within a material when thermal expansion or contraction is constrained by rigid boundaries.
σ = E α ΔT
Third Law of Thermodynamics
Thermodynamics & Statistical Physics
J/K
The law stating that as system temperature approaches absolute zero (0 K), entropy of a pure crystalline substance approaches a minimum constant value of zero.
lim (T → 0) S = 0
Van der Waals Equation
Thermodynamics & Statistical Physics
Pa·m³
An equation of state modifying the ideal gas law to account for finite molecular volume and attractive intermolecular forces in real gases.
(P + a n² / V²) (V - n b) = n R T
Water Equivalent
Thermodynamics & Statistical Physics
kg (or g)
The mass of water that absorbs or releases the exact same amount of heat as a calorimeter body for an identical temperature change.
w = m_cal c_cal / c_water
Wien's Displacement Law
Thermodynamics & Statistical Physics
m·K
The physical law stating that peak emission wavelength of a blackbody spectrum is inversely proportional to its absolute temperature.
λ_max T = b ≈ 2.89777 × 10⁻³ m·K
Zeroth Law of Thermodynamics
Thermodynamics & Statistical Physics
N/A
The law stating that if two systems are each in thermal equilibrium with a third system, they are in thermal equilibrium with each other.
If T_A = T_C and T_B = T_C, then T_A = T_B