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Thermodynamic Properties
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Temperature
Measure of the average kinetic energy of the particles in a substance. Units: Kelvin (K), Celsius (°C), Fahrenheit (°F)
Pressure
Force exerted per unit area. Units: Pascal (Pa), bar, atmospheres (atm)
Volume
Space occupied by a substance. Units: Cubic meters (m^3), liters (L), gallons (gal)
Entropy
Measure of disorder or randomness in a system. Units: Joules per Kelvin (J/K)
Enthalpy
Total heat content of a system at constant pressure. Units: Joules (J)
Internal Energy
Total energy contained within a system. Units: Joules (J)
Gibbs Free Energy
Energy associated with a chemical reaction that can be used to do work. Units: Joules (J)
Heat Capacity
Quantity of heat required to raise the temperature of a substance by one degree. Units: Joules per Kelvin (J/K)
Thermal Conductivity
Measure of a material's ability to conduct heat. Units: Watts per meter-Kelvin (W/(m·K))
Specific Heat
Heat capacity per unit mass. Units: Joules per kilogram-Kelvin (J/(kg·K))
Specific Volume
Volume occupied by a unit mass of a substance. Units: Cubic meters per kilogram (m^3/kg)
Viscosity
A fluid's resistance to flow. Units: Pascal-seconds (Pa·s), also known as Poiseuille (Pl)
Thermal Expansion Coefficient
Measure of a material's fractional change in length or volume per degree change in temperature. Units: Per Kelvin (1/K)
Molar Heat Capacity
Heat capacity per mole of a substance. Units: Joules per mole-Kelvin (J/(mol·K))
Phase
Distinct state of matter characterized by its properties. No specific units.
Reynolds Number
Dimensionless quantity used to predict flow patterns in fluid dynamics. No specific units.
Heat of Fusion
Amount of energy needed to change a substance from the solid phase to the liquid phase at its melting point. Units: Joules per kilogram (J/kg)
Heat of Vaporization
Amount of energy needed to change a substance from the liquid phase to the gaseous phase at its boiling point. Units: Joules per kilogram (J/kg)
Prandtl Number
Dimensionless number that relates the momentum diffusivity (kinematic viscosity) to the thermal diffusivity. No specific units.
Mach Number
Dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. No specific units.
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