Enthalpy and Entropy (OCR A-Level Chemistry A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which property is NOT characteristic of ionic compounds?
Which property is NOT characteristic of ionic compounds?
Low boiling points
What is lattice enthalpy?
What is lattice enthalpy?
Enthalpy change separating ions in 1 mol
How does lattice enthalpy change down Group 1 for chlorides?
How does lattice enthalpy change down Group 1 for chlorides?
Becomes less negative
Why does NaCl have a higher melting point (801°C) than RbCl (718°C)?
Why does NaCl have a higher melting point (801°C) than RbCl (718°C)?
is smaller than
Which has the more negative lattice enthalpy: or ?
Which has the more negative lattice enthalpy: or ?
(-3414 kJ/mol)
Which factor has the more dramatic effect on lattice enthalpy?
Which factor has the more dramatic effect on lattice enthalpy?
Ionic charge
What happens to hydration enthalpy down Group 1?
What happens to hydration enthalpy down Group 1?
Becomes less negative
Why do larger ions have less negative hydration enthalpies?
Why do larger ions have less negative hydration enthalpies?
Lower charge density
Why are metal oxides like used as refractory materials?
Why are metal oxides like used as refractory materials?
High lattice enthalpy
When should an ionic compound dissolve in water?
When should an ionic compound dissolve in water?
Hydration enthalpy > lattice enthalpy