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19 November, 08:13

How much energy must be added to a 2-kg piece of aluminum with a specific

heat of 900 J / (kg°C) to increase its temperature from 10°C to 50°C?

O

A. 1,800 J

O B. 900,000 J

O C. 108,000 J

O D. 72,000 J

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Answers (1)
  1. 19 November, 08:26
    0
    Answer: 72,000 Joules

    Explanation:

    Heat Energy Q = Mass M x Specific heat capacity C x change in temperature Φ

    Thus, Q = MCΦ

    Then, M = 2-kg

    C = 900 J / (kg°C)

    Φ = 50°C - 10°C = 40°C

    Q = 2 x 900 x 40

    Q = 72,000 Joules

    Thus, it takes 72,000 Joules of energy
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