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28 January, 22:59

Calculate the amount of heat necessary to raise the temperature of 135.0 g of water from 50.4°F to 85.0°F. The specific heat of water = 4.184 J/g·°C.

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  1. 29 January, 00:33
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    Here we have to calculate the heat required to raise the temperature of water from 85.0 ⁰F to 50.4 ⁰F.

    10.857 kJ heat will be needed to raise the temperature from 50.4 ⁰F to 85.0 ⁰F

    The amount of heat required to raise the temperature can be obtained from the equation H = m*s * (t₂-t₁).

    Where H = Heat, s = specific gravity = 4.184 J/g.⁰C, m = mass = 135.0 g, t₁ (initial temperature) = 50.4 ⁰F or 10.222 ⁰C and t₂ (final temperature) = 85.0⁰F or 29.444 ⁰C.

    On plugging the values we get:

    H = 135.0 g * 4.184 J/g.⁰C * (29.444 - 10.222) ⁰C

    Or, H = 10857.354 J or 10.857 kJ.

    Thus 10857.354 J or 10.857 kJ heat will be needed to raise the temperature.
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