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10 July, 12:33

Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32 ∘C to 65 ∘C. (The specific heat capacity of water is 4.184 J / (g⋅∘C).

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  1. 10 July, 13:18
    0
    The amount of heat required is 9.0 kJ.

    q = mCΔT

    ΔT = T_f - T_i = 65 °C - 32 °C = 33 °C

    q = 65 g * 4.184 J·°C⁻¹g⁻¹ * 33 °C = 9000 J = 9.0 kJ
  2. 10 July, 15:24
    0
    8974.68 J.

    Explanation:

    The amount of heat required to raise the temperature of water sample can be calculated using the formula:

    Q = m. C.ΔT, where,

    Q is the amount of heat required to raise the temperature of water sample,

    m is the mass of water sample (m = 65.0 g),

    C is the specific heat of water (C = 4.184 J/g.°C),

    ΔT is the temperature difference (the final temperature - the initial temperature (ΔT = 65.0 - 32.0 = 33.0 °C).

    ∴ The amount of heat required to raise the temperature of water sample Q = m. C.ΔT = (65.0 g) (4.184 J/g.°C) (33.0 °C) = 8974.68 J.
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