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13 December, 02:24

A researcher studying the nutritional value of a new candy places a 4.40-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.87 °C. If the heat capacity of the calorimeter is 41.50 kJ·K-1, how many nutritional Calories are there per gram of the candy?

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  1. 13 December, 05:45
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    Calories = 1gCandy * (41.50KJ / 4.40gCandy) * (239calories / 1KJ)

    q = (41.50 KJ / K) * (276.02 K)

    q = 11454.83 K J

    Calories = 1gCandy * (11454.83 K J / 4.40gCandy) * (1 KCal / 4.184 KJ)

    Calories = 622 KCal
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