Learning objective
Use q = mcΔT to calculate heat energy transferred.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
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Flashcards
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Questions
Topic
Energetics
Subtopic
Calorimetry and enthalpy measurements
Study support
Understand this objective
Quick explanation
Use q = mcΔT to calculate heat energy transferred
- This point belongs to Energetics, especially Calorimetry and enthalpy measurements.
- You need to be able to use q = mcΔT to calculate heat energy transferred.
- The key ideas to know are transferred, calculate, and heat.
- 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 heat energy transferred when 200 g of water is heated from 25 °C to 75 °C? (Specific heat capacity of water = 4.18 J/g°C)
Direct answer
The heat energy transferred is calculated using the formula q = mcΔT.
Key terms
- Calorimetry: The measurement of heat changes in physical and chemical processes.
- Enthalpy: A measure of the total energy of a thermodynamic system, often associated with heat changes at constant pressure.
Common trap
Incorrectly calculating ΔT: Always ensure that ΔT = final temperature - initial temperature.
Related questions
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Flashcard prompts
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Revision tools
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Revision notestopic notes
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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
- Convert calorimetry data into molar enthalpy changes.
Calorimetry and enthalpy measurements