if irons temp goes from 50c to 75c in a 20g sample how many joules of heat were used

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if irons temp goes from 50c to 75c in a 20g sample how many joules of heat were used

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Diễm Thu 3 years 2021-07-30T17:11:40+00:00 1 Answers 6 views 0

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  1. haidang
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    2021-07-30T17:12:56+00:00
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    Answer:

    224.5J

    Explanation:

    Using the formula as follows:

    Q = m × c × ∆T

    Where;

    Q = amount of heat (J)

    m = mass of substance (g)

    c = specific heat capacity.

    ∆T = change in temperature (°C)

    According to this question;

    m = 20g

    ∆T = 75°C – 50°C = 25°C

    Q = ?

    c of iron = 0.449 J/g°C

    Using Q = m × c × ∆T

    Q = 20 × 0.449 × 25

    Q = 224.5J

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