saplinglearning.com Inverted Lecture #42: CHE 106 H002 Gen Chemistry I Universit

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saplinglearning.com Inverted Lecture #42: CHE 106 H002 Gen Chemistry I University of Southen Mississ Mississippi - CHE 106-Fall17-BROOME Activities and Due Dates HWS 0/17/2017 05:00 PM 4 84.7/10010/16/2017 07:26 PM - -Print CalculatorPeriodic Table tion 20 of 30 eneral Chemistry 4th Edition University Science Books presented by Sapling Leamng A researcher studying the nutritional value of a new candy places a 3.60-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. the heatcapacity of the calorimeter is 3960 kJ·K-1 how many nutritional Calones are there per gram of the candy? The observed temperature increase is 2.23 Number 2813184Cal/ g There is a hint available! View the hint by clicking on the bottom divider bar divider bar again to hide the hinl Close Check Answer e Neal O Previous Give Up & View Saluton ? Hint

Explanation / Answer

Mass of the compound = 3.6g

Change in temperature = 2.23 0C

Heat capacity of the calorie meter = 39.60 kJ/k

Q = m * S * dT

Q = 3.6 * 39.60 * (2.23) ( the magnitude of 0C and Kelvin are same on the temperature scale)

Q = 317.91 kJ for 3.6 g of Candy

for 1 g of Candy = 317.91/3.68 = 86.388 kJ/g

1 calorie = 4.184J

1 Joule = 1/4.184 Cal

1kJ = 1/4.184 kCal

the energy value of candy = 86.388 * 1/4.184 kCal/mol

Nutrotion value of Candy = 20.6472 kCal/mol = 20647.2 Cal/g

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