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27 April, 21:00

Imagine that you have a 500 g iron pot (c = 0.440), a 500 g copper pot (c = 0.385), and a 500 g aluminum pot (c = 0.897). You fill each pot with 250 mL of water and heat the water to 100°C on a stove. Which pot will keep the water warm the longest? Explain your answer.

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  1. 28 April, 00:20
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    Aluminium

    Explanation:

    If we calculate the heat transfer for all the substances, we have

    Mc (∆T)

    Where M is mass

    C is heat capacity

    ∆T is temperature change.

    For iron

    Mc (∆T) = 500 * 0.440*100 = 22000J

    For copper

    Mc (∆T) = 500 * 0.385*100 = 19250J

    For aluminium

    Mc (∆T) = 500 * 0.897*100 = 44850J

    Aluminium has the highest heat capacity and would take longest for this heat capacity to be dissipated under similar condition.
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