Knowledge Organiser: Specific Heat Capacity
This topic summary covers Knowledge Organiser: Specific Heat Capacity within Specific Heat Capacity for GCSE Physics. Revise Specific Heat Capacity in Energy for GCSE Physics with 15 exam-style questions and 13 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 16 of 16 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 16 of 16
Practice
15 questions
Recall
13 flashcards
Knowledge Organiser: Specific Heat Capacity
Key Terms
- SHC (c): energy to raise 1 kg of a substance by 1°C (J/kg°C)
- Δθ: temperature change = final − initial (°C)
- Thermal equilibrium: no net heat flow between objects
- Systematic error: consistent offset due to heat loss
Key Equation
- ΔE = mcΔθ
- c = ΔE / (mΔθ)
- Δθ = ΔE / (mc)
- Water SHC = 4200 J/kg°C
Key Facts
- High SHC = slow to heat/cool (stores lots of energy)
- Low SHC = heats up and cools quickly
- Experimental SHC always too HIGH (heat loss to surroundings)
- Water used in heating because of its very high SHC
Exam Tips
- Δθ is temperature CHANGE, not final temperature
- Mass in kg — convert from grams!
- Practical result too high → heat loss to surroundings
- Improvements: insulate block, oil in thermometer hole
Common Mistakes
- Using temperature instead of temperature change: ΔT is the change in temperature — not the final temperature reading
- Mass in grams not kg: The equation requires mass in kg — divide grams by 1000 before substituting
- Misidentifying the practical error: If the measured SHC is too high, energy was lost to surroundings (insulation poor), not gained
- Rearranging incorrectly: To find SHC: c = ΔE ÷ (m × ΔT) — divide by the product of m and ΔT, not just one of them
- Confusing SHC with latent heat: SHC applies when temperature changes; latent heat applies during a change of state (no temperature change)
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Practice Questions for Specific Heat Capacity
What does the specific heat capacity of a substance measure?
Water has a specific heat capacity of 4200 J/kg°C, much higher than most other common substances. Explain why this makes water useful in central heating systems.
Quick Recall Flashcards
15 questions on Specific Heat Capacity — practise free
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