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11 October, 23:21

How much energy in Joules is released by burning a cheese ball that raises the temperature of

74.2 g water from 24°C to 41°C? How many Calories is this?

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Answers (1)
  1. 11 October, 23:39
    0
    1. The heat energy in Joules is 5280.22J

    2. The heat energy in calories is 1261.4 calories

    Explanation:

    Step 1:

    Data obtained from the question.

    The following data were obtained from the question:

    Mass of water (M) = 74.2 g

    Initial temperature (T1) = 24°C

    Final temperature (T2) = 41°C

    Change in temperature (ΔT) = T2 - T1 = 41 - 24 = 17°C

    Heat energy (Q) = ?

    Recall:

    Specific heat capacity of water = 4.186 J/g°C

    Step 2:

    Determination of the energy in Joules.

    This is illustrated below:

    Q = MCΔT

    Q = 74.2 x 4.186 x 17

    Q = 5280.22J

    Step 3:

    Conversion of the heat energy in Joules to calories. This is illustrated below:

    4.186 J = 1 calorie

    Therefore, 5280.22J = 5280.22/4.186 = 1261.4 calories
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