Learning objective
Use appropriate units and significant figures in enthalpy calculations.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
0
Flashcards
0
Questions
Topic
Energetics
Subtopic
Calorimetry and enthalpy measurements
Study support
Understand this objective
Quick explanation
Use appropriate units and significant figures in enthalpy calculations
- This point belongs to Energetics, especially Calorimetry and enthalpy measurements.
- You need to be able to use appropriate units and significant figures in enthalpy calculations.
- The key ideas to know are enthalpy, units, and significant.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Calorimetry and enthalpy measurements to exam-style questions, flashcards, and revision notes for Energetics.
Quick student answer
What is the unit of enthalpy change (ΔH)?
Direct answer
The correct unit for enthalpy change is kJ/mol.
Key terms
- Exothermic Reaction: A reaction that releases energy in the form of heat to its surroundings.
- Endothermic Reaction: A reaction that absorbs energy from its surroundings, resulting in a decrease in temperature.
Common trap
Incorrect unit usage in enthalpy calculations: Always express enthalpy changes in kJ/mol to maintain consistency with standard units.
Related questions
Try this as a practice card
Question 1 of 3
Choose an answer, get feedback, then move sideways through the set.
Flashcard prompts
Flip through the key recall cards
Flashcard 1 of 3
Revision tools
Choose how to practise
Flashcards0 linked cards
Practice Questions0 linked questions
Revision notestopic notes
Open the full topic revision notes when you are ready to review this objective in context.
Open revision notesRelated learning objectives
- Define enthalpy change under constant pressure.
Enthalpy change
- Distinguish exothermic and endothermic reactions using enthalpy change signs.
Enthalpy change
- Interpret reaction profile diagrams.
Enthalpy change
- Define standard enthalpy changes for formation, combustion and neutralisation where appropriate.
Enthalpy change
- Use q = mcΔT to calculate heat energy transferred.
Calorimetry and enthalpy measurements