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5 August, 09:15

A 5.63 g sample of solid gold is heated from 21.0 ºC to 32.0 ºC. How much energy (in J and cal) is required?

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  1. 5 August, 09:38
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    According to q formula:

    q = M C ΔT

    when q is the energy required in Joule

    M is the mass per kilogram=5.63 g / 1000 = 0.00563 Kg

    C is the specific heat capacity of the gold J (Kg-K) = 125.6 J (Kg-K) (should be given in the specific heat capacity table)

    ΔT is the change in the temperature = (32 - 21) = 11 C°

    ∴q = 0.00563 * 125.6 * 11 = 7.78 J = 1.86 Cal
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