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?

Question

Chemistry

Macie Navarro

25 December, 10:14

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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Hudson Ponce · Answer 1

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