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Definitions I struggle with

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Total cards: 8•Content version: v3•Public deck•Updated: 8/1/2026

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#1
Front (Question)

Enthalpy of reaction ΔrH

Back (Answer)

enthalpy change that accompanies a reaction in the molar quantities shown in a chemical equation under standard conditions, with all reactants and products in their standard states

#2
Front (Question)

Enthalpy of formation ΔfH

Back (Answer)

enthalpy change when one mole of compound is formed from its constituent elements under standard conditions

#3
Front (Question)

Enthalpy of combustion ΔcH

Back (Answer)

enthalpy change when one mole of substance is burnt completely in excess oxygen under standard conditions

#4
Front (Question)

Electron affinity

Back (Answer)

The enthalpy change when one mole of electron is added to one mole of atoms in the gaseous phase to form one mole of -1 ions

#5
Front (Question)

Lattice Enthalpy

Back (Answer)

ΔHlatt is the enthalpy change when 1 mole of ionic substance is formed from its gaseous ions under standard conditions

#6
Front (Question)

Enthalpy of solution

Back (Answer)

DeltasolutionH is the enthalpy change when one mole of ionic compound is completely dissolved in water under standard conditions

#7
Front (Question)

Enthalpy of hydration

Back (Answer)

Delta Hhydration¬ is the enthalpy which takes place when one mole of gaseous ions is dissolved in water forming one mole of aqueous ions under standard conditions

#8
Front (Question)

Standard entropy change

Back (Answer)

The standard entropy change is the entropy change that accompanies a reaction in the molar quantities expressed in the equation, under standard conditions