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AQA A level Chemistry 3.1.8 - Thermodynamics Exam 2024 Questions and Answers
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AQA A level Chemistry 3.1.8 - Thermodynamics Exam 2024 Questions and Answers
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AQA A level Chemistry 3.1.8 -Thermodynamics Exam 2024 Questions
and Answers
What are standard conditions? - Answer>> 298K/25°C
100kPa/1 atm
1 moldm-3
Enthalpy change of formation - Answer>> The enthalpy change
when 1 mole of a compound is formed from its constituent
elements under standard conditions, with all reactants and
products in their standard states.
Enthalpy change of combustion - Answer>> The enthalpy
change when 1 mole of a substance is burned completely in
oxygen.
Enthalpy change of atomisation - Answer>> The enthalpy
change that accompanies the formation of 1 mole of gaseous
atoms from the element in its standard state.
First ionisation enthalpy - Answer>> The enthalpy change when
1 mole of gaseous atoms loses 1 electron per atom to form 1
mole of gaseous 1+ ions.
Second ionisation enthalpy - Answer>> The enthalpy change
when 1 mole of gaseous 1+ ions loses 1 electron per atom to
form 1 mole of gaseous 2+ ions.
First electron affinity - Answer>> The enthalpy change when 1
mole gaseous atoms gains 1 electron per atom to form 1 mole of
gaseous 1- ions.
, Second electron affinity - Answer>> The enthalpy change when
1 mole of gaseous 1- ions gains 1 electron per atom to form 1
mole of gaseous 2- ions.
Mean bond enthalpy - Answer>> The enthalpy change when 1
mole of gaseous molecules each breaks a covalent bond to form
2 gaseous ions or free radicals.
Lattice enthalpy of formation - Answer>> The enthalpy change
when 1 mole of a solid ionic compound is formed from its gaseous
ions.
Lattice enthalpy of dissociation - Answer>> The enthalpy
change when 1 mole of a solid ionic compound dissociates into its
gaseous ions.
Enthalpy of hydration - Answer>> The enthalpy change when 1
mole of gaseous ions dissolves completely in water.
Enthalpy of solution - Answer>> The enthalpy change when 1
mole of an ionic solid dissolves in enough solvent to ensure that
the dissolved ions are well separated and do not interact with one
another.
Enthalpy of vaporisation - Answer>> The enthalpy change
when 1 mole of a liquid evaporates to form 1 mole of a gas.
Enthalpy of sublimation - Answer>> The enthalpy change when
1 mole of a solid sublimes to form 1 mole of a gas.
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