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19 November, 10:35

The amount of heat needed

to raise 2.0 kg of a substance by 80 K is 33 kJ. What is the specific heat of

the substance?

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Answers (1)
  1. 19 November, 10:45
    0
    Q = mcθ

    Where Q = Amount of heat in J

    m = Mass of substance in kg

    θ = Temperature rise in °C or K

    C = Specific heat capacity in J/kgK

    From given dа ta:

    Q = 33 kJ = 33 000 J, m = 2.0 kg, θ = 80 K, c = ?

    33000 = 2 * c * 80

    33000 = 160c

    160c = 33000

    c = 33000/160 = 206.25

    Therefore specific heat capacity is 206.25 J/kgK
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