Thermodynamics flash cards 0.0 / 5 ? ChemistryEntropyA2/A-levelAQA Created by: Naomi444Created on: 10-03-18 01:51 State Hess' Law The enthalpy change of a reaction is independent of the route taken and depends only on the initial and final state 1 of 7 Define Enthalpy of formation The enthalpy change when 1 mol of a compound is formed from its constituent elements, under standard conditions, 2 of 7 Define Enthalpy of combustion The enthalpy change when 1 mol of a substance is completely burned in oxygen, under standard conditions. All substances in standard states 3 of 7 Standard enthalpy of formation of an element Zero, by definition 4 of 7 2 Factors affecting Lattice enthalpy 1.Size of ion 2.Charge on ions 5 of 7 How does a smaller ion increase the lattice enthalpy of a compound? Smaller ionic radius means that the ions are held closer together in the lattice 6 of 7 How can Born- Haber Cycles be used to see if a compound really exists? Use known data to predict certain values of theoretical compounds and then see if they are thermodynamically stable. 7 of 7
Comments
No comments have yet been made