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Results for “Enthalpy”

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Thermochemistry & Thermodynamics

Standard Enthalpy of Combustion

The enthalpy change when one mole of a substance burns completely in excess oxygen under standard conditions.

ΔH_c° kJ/mol
Thermochemistry & Thermodynamics

Standard Enthalpy of Formation

The enthalpy change when one mole of a compound forms from its elements in their standard states.

ΔH_f° kJ/mol
Thermochemistry & Thermodynamics

Spontaneity

The tendency of a process to occur without any continuous external input of energy.

ΔG < 0 kJ/mol
Stoichiometry & Chemical Reactions

Stoichiometric Coefficient

The number written before a formula in a balanced equation, giving the relative amount of that substance consumed or produced.

Dimensionless
Solutions & Colligative Properties

Supersaturated Solution

An unstable solution containing more dissolved solute than the equilibrium solubility at that temperature.

mol/L
Thermochemistry & Thermodynamics

State Function

A property whose value depends only on the current state of the system, not on how that state was reached.

ΔX = X_final − X_initial Various