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27 July, 10:17

If a 375 mL sample of water was cooled from 37.5 C to 0 C how much heat wad lost in joules

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  1. 27 July, 10:34
    0
    1 mL = 1 gram

    Q=375*4.179*37.5
  2. 27 July, 10:40
    0
    The equation for heat is

    Q = m*Cp*del (T) where

    Q = heat in Joules

    m = mass in kg

    Cp = the heat capacity of water at a constant pressure = 4,184 J/kgC

    del (T) = the change in temperature in either K or degrees C

    1 liter of water = 1 kg at standard temperature and pressure.

    375 mL water x (1 kg/1L water) = 0.375 kg water.

    Q = (0.375 kg water) (4184 J/kgC) (37.5 C - 0 C) = 58,800 Joules.
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