Enthalpy Changes in Solution (OCR A-Level Chemistry A): Quizzes

📚Quizzes
Revision NotesModel AnswersQuizzesFlashcardsExam Questions
Enthalpy Changes in Solution
Sign up to keep practising.Create a free account to play more quizzes and track your progress.

Practise the questions

10 questions from this quiz

Show

What is the standard enthalpy change of solution?

Enthalpy change when 1 mol solute dissolves

What is the sign of ΔsolH∘\Delta_{\text{sol}}H^\circ for an endothermic dissolution?

Positive

Breaking an ionic lattice into gaseous ions is:

Endothermic

The enthalpy change of hydration is always:

Exothermic

In q=mcΔTq = mc\Delta T, which mass should be used?

Mass of entire solution

Which part of water attracts positive ions?

Oxygen with δ−\delta^- charge

What does Hess's law equation relate for dissolution?

ΔLEH+ΔsolH=ΔhydH\Delta_{\text{LE}}H + \Delta_{\text{sol}}H = \Delta_{\text{hyd}}H terms

Why do cold packs work for injuries?

Endothermic dissolution absorbs heat

For CaBr2\text{CaBr}_2, how is ΔhydH∘\Delta_{\text{hyd}}H^\circ of Br−\text{Br}^- used?

Multiply by 2

Dissolution is exothermic when:

Hydration energy > lattice energy

Explore OCR A-Level Chemistry A Revision Notes by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Explore OCR A-Level Chemistry A Model Answers by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Explore OCR A-Level Chemistry A Flashcards by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Explore OCR A-Level Chemistry A Exam Questions by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Join 100,000+ A-Level students studying Quizzes with us.

Select your subjects, and get access to A+ resources today.