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16 May, 06:52

An iron block of mass 45.87 kg is heated from 7 c to 218

c. if the specific heat of iron is 450 j-1 kg k-1 then how much energy is required

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  1. 16 May, 09:06
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    Given:

    m = 45.87 kg, mass of iron block

    c = 450 / (kg-K), specific heat

    T₁ = 7 C, initial temperature

    T₂ = 218 C, final temperature

    Energy required is

    Q = m*c * (T₂ - T₁)

    = (45.87 kg) * (450 J / (kg-K) (218 - 7 K)

    = 4.3554 x 10⁶ J

    = 4.3554 MJ

    Answer: 4.36 MJ (nearest hundredth)
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