If the specific heat of iron = 0.46J C, how much heat is needed to warm 50 g of iron from 20C to 100C

Question

If the specific heat of iron = 0.46J C, how much heat is needed to warm 50 g of iron from 20C to 100C

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Thông Đạt 3 years 2021-08-27T08:20:43+00:00 1 Answers 22 views 0

Answers ( )

  1. taiduc
    0
    2021-08-27T08:21:47+00:00
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    Answer:

    1840 J

    Explanation:

    From the question given above, the following data were obtained:

    Specific heat capacity (C) = 0.46 J/gºC

    Mass (M) = 50 g

    Initial temperature (T₁) = 20 °C

    Final temperature (T₂) = 100 °C

    Heat (Q) required =?

    Next, we shall determine the change in the temperature. This can be obtained as follow:

    Initial temperature (T₁) = 20 °C

    Final temperature (T₂) = 100 °C

    Change in temperature (ΔT) =?

    ΔT = T₂ – T₁

    ΔT = 100 – 20

    ΔT = 80 °C

    Finally, we shall determine the heat required. This can be obtained as follow:

    Specific heat capacity (C) = 0.46 J/gºC

    Mass (M) = 50 g

    Change in temperature (ΔT) = 80 °C

    Heat (Q) required =?

    Q = MCΔT

    Q = 50 × 0.46 × 80

    Q = 1840 J

    Thus, 1840 J of heat energy is required.

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