How much thermal energy is needed to raise the temperature of 4.0 kg of water from 25°C to 75°C?

Question

How much thermal energy is needed to raise the temperature of 4.0 kg of water from 25°C to 75°C?

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Adela 4 years 2021-08-27T15:35:00+00:00 2 Answers 62 views 0

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  1. Thunguyet
    0
    2021-08-27T15:36:41+00:00
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    Answer:

    313.5 joule thermal energy is required

  2. Dulcie
    0
    2021-08-27T15:36:49+00:00
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    Answer: Q= 840,000 J

    Explanation: We will use the formula for heat to solve this problem Q= mc∆T, where the specific heat or “c” of water is 4200 J/kg°C. The change in temperature ∆T is equal to ∆T = ( 75°C-25°C) = 50°C

    Q= 4.0 kg ( 4200 J/kg°C) ( 50°C)

    = 840,000J

    Cancel out the units of kg and °C so the remaining unit is in joules.

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