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25 December, 20:36

What energy is needed to raise the temperature of 2 kg of water from 20 ºC to 100 ºC. The heat capacity of water is 4190 J / kg / ºC.

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  1. 25 December, 20:43
    0
    670400 J

    Explanation:

    m = mass of water = 2 kg

    T₀ = initial temperature of water = 20 ºC

    T = initial temperature of water = 100 ºC

    c = heat capacity of water = 4190 J / kg ºC

    Q = energy needed to raise the temperature of water

    Energy needed to raise the temperature of water is given as

    Q = m c (T - T₀)

    Inserting the values

    Q = (2) (4190) (100 - 20)

    Q = 670400 J
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