# Shared Flashcard Set

## Details

Thermal Physics
N/A
24
Physics
12/12/2011

Term
 Temperature (T)
Definition
 a. The property that determines the direction of thermal energy transfer between two objects.b.)A measure of the average random kinetic energy of the particles of a substance.
Term
 Thermal Equilibrium
Definition
 two objects are in thermal equilibrium when they are at the same temperature so that there is no transfer of thermal energy between them
Term
 *Internal Energy of a substance(U)
Definition
 The total potential energy and random kinetic energy of the molecules of the substance.
Term
 *Thermal Energy (Heat) (Q)
Definition
 Energy transferred between two substances in thermal contact due a temperature difference.
Term
 *Mole
Definition
 An amount of a substance that contains the same number of atoms as 0.012 kg of 12C.
Term
 *Molar Mass
Definition
 The mass of one mole of a substance.
Term
Definition
 The number of atoms in 0.012 kg of 12C (= 6.02 x 1023).
Term
 *Thermal Capacity (C)
Definition
 energy required to raise the temperature of a substance by 1K
Term
 *Specific Heat Capacity (c)
Definition
 energy required per unit mass to raise the temperature of a substance by 1K
Term
 Boiling
Definition
 a phase change of a liquid into a gas that occurs at a fixed temperature
Term
 Evaporation
Definition
 when faster moving molecules have enough energy to escape from the surface of a liquid that is at a temperature less than its boiling point, leaving slower moving molecules behind which results in a cooling of the liquid
Term
 *Specific Latent Heat (L)
Definition
 energy per unit mass absorbed or released during a phase change
Term
 *Pressure (P)
Definition
 force per unit area acting on a surface
Term
 *Ideal Gas
Definition
 a gas that follows the ideal gas equation of state (PV = nRT) for all values of P, V, and T (an ideal gas cannot be liquefied)
Term
 Real Gas
Definition
 a gas that does not follow the ideal gas equation of state for all values of P, V, and T (a real gas can approximate an ideal gas in some circumstances)
Term
 Absolute Zero of Temperature
Definition
 temperature at which a gas would exert no pressure
Term
 Kelvin scale of Temperature
Definition
 an absolute scale of temperature in which 0 K is the absolute zero of temperature
Term
 *First Law of Thermodynmaics (U = ΔU + W)
Definition
 The thermal energy transferred to a system from its surroundings is equal to the work done by the system plus the change in internal energy of the system. (an application of the principle of conservation of energy)
Term
 Isochoric (Isovolumetric)
Definition
 a process that occurs at constant volume (ΔV = 0)
Term
 Isobaric
Definition
 a process that occurs at constant pressure (ΔP = 0)
Term
 Isothermal
Definition
 a process that occurs at constant temperature (ΔT = 0)
Term