Thermochemistry & Thermodynamics
60 terms · page 3 of 3
Standard Molar Entropy
The absolute entropy of one mole of a substance in its standard state at 298 K.
Thermochemistry & ThermodynamicsStandard State
The reference condition of a pure substance at 1 bar pressure and a stated temperature, conventionally 298.15 K.
Thermochemistry & ThermodynamicsState Function
A property whose value depends only on the current state of the system, not on how that state was reached.
Thermochemistry & ThermodynamicsSurroundings
Everything outside the chosen system with which it can exchange energy or matter.
Thermochemistry & ThermodynamicsSystem
The specific part of the universe chosen for thermodynamic study, separated from everything else by a real or imaginary boundary.
Thermochemistry & ThermodynamicsThermochemical Equation
A balanced chemical equation that also states the enthalpy change for the amounts shown.
Thermochemistry & ThermodynamicsThermodynamic Equilibrium
The state in which a system's properties no longer change with time and all driving forces are balanced.
Thermochemistry & ThermodynamicsThermodynamics
The branch of science dealing with energy, its transformations, and the direction in which processes occur.
Thermochemistry & ThermodynamicsThird Law of Thermodynamics
The entropy of a perfect crystalline substance approaches zero as the temperature approaches absolute zero.
Thermochemistry & ThermodynamicsTrouton's Rule
The empirical observation that the entropy of vaporisation of many liquids is close to 88 J/(mol·K) at their boiling point.
Thermochemistry & ThermodynamicsWork
Energy transferred when a force moves through a distance, most often in chemistry as a gas expanding against external pressure.
Thermochemistry & ThermodynamicsZeroth Law of Thermodynamics
If two systems are each in thermal equilibrium with a third, they are in thermal equilibrium with each other.