Specific heat capacity (AQA A-Level Physics): Flashcards

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Specific heat capacity
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Define specific heat capacity

Energy to raise 1 kg by 1°C without state change

SI units of specific heat capacity

J kg1^{-1} °C1^{-1} or J kg1^{-1} K1^{-1}

Equation: energy, mass, specific heat, temp change

Q=mcΔθQ = mc\Delta\theta

Specific heat capacity of water (J kg1^{-1} °C1^{-1})

4190

Electrical power from voltage and current

P=VIP = VI

Specific heat capacity by electrical heating

c=VItmΔθc = \frac{VIt}{m\Delta\theta}

Temp rise formula for falling object (height hh)

Δθ=ghc\Delta\theta = \frac{gh}{c}

Mass effect on temp rise of falling object

Independent of mass

Effect of higher specific heat capacity

Smaller temp change for same energy

Method of mixtures energy principle

Energy lost by hot object = energy gained by cold water

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