Energy changes in systems (AQA GCSE Physics): Flashcards

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Energy changes in systems
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What is specific heat capacity?

Energy to raise 1 kg of material by 1°C

Water's specific heat capacity (J/kg°C)

4200

Equation for thermal energy change

ΔE=mcΔθ\Delta E = mc\Delta\theta

ΔE\Delta E in thermal energy equation

Change in thermal energy (J)

mm in thermal energy equation

Mass of material (kg)

cc in thermal energy equation

Specific heat capacity (J/kg°C)

Δθ\Delta\theta in thermal energy equation

Change in temperature (°C)

Air's specific heat capacity (J/kg°C)

1005

Aluminium's specific heat capacity (J/kg°C)

900

Concrete's specific heat capacity (J/kg°C)

880

Equation to find cc from ΔE\Delta E, mm, Δθ\Delta\theta

c=ΔEm×Δθc = \frac{\Delta E}{m \times \Delta\theta}

Why is water good for heating systems?

High specific heat capacity

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