Thermodynamics (A Level only) (AQA A-Level Chemistry): Flashcards

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Thermodynamic Terms
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Standard conditions (pressure & temp)

100 kPa and 298 K

Define ΔfH∘\Delta_fH^\circ

ΔH when 1 mol compound forms from elements in standard states

Define ΔcH∘\Delta_cH^\circ

ΔH when 1 mol substance completely burned in O2O_2

Define bond dissociation enthalpy

ΔH when 1 mol covalent bonds broken (gaseous state)

Define ΔatH∘\Delta_{at}H^\circ

ΔH for forming 1 mol gaseous atoms from element in standard state

Define first ionisation enthalpy

ΔH when 1 mol e−e^- removed from 1 mol gaseous atoms to form +1 ions

First electron affinity sign

Negative (exothermic)

Second electron affinity sign

Positive (endothermic)

Define lattice dissociation enthalpy

ΔH when 1 mol ionic compound separated into gaseous ions

Define ΔhydH∘\Delta_{hyd}H^\circ

ΔH when 1 mol gaseous ions converted to aqueous ions

Explore AQA A-Level Chemistry Revision Notes by Topics

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Explore AQA A-Level Chemistry Model Answers by Topics

Thermodynamics (A Level only)

Rate Equations (A Level only)

Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

Fundamentals of Acids & Bases (A Level only)

Further Acids & Bases Calculations (A Level only)

Explore AQA A-Level Chemistry Quizzes by Topics

Thermodynamics (A Level only)

Rate Equations (A Level only)

Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

Fundamentals of Acids & Bases (A Level only)

Further Acids & Bases Calculations (A Level only)

Explore AQA A-Level Chemistry Exam Questions by Topics

Thermodynamics (A Level only)

Rate Equations (A Level only)

Equilibrium constant (Kp) for Homogeneous Systems (A Level only)

Electrode Potentials & Electrochemical Cells (A Level only)

Fundamentals of Acids & Bases (A Level only)

Further Acids & Bases Calculations (A Level only)

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