A food chemist is testing out a new calorimetry device that measures the caloric value of their company’s peanut butter popcorn. It does this by combusting the food and measuring the heat transfer to a reservoir of water. Important values: cwater = 4186 J/kg*oC; ρwaer = 1.00 g/mL; Lsteam = 2.26 x 106 J/kg; Tv = 100oC; 1 cal = 4.186 J If the reservoir of water contains 15.00 L of water at 20oC, what would be its temperature after absorbing the energy from combusting 0.250 kg of simple carbohydrates? Assume that the energy contribution from combusting a simple carbohydrate is 4.00 kilocalories/gram and that there is no loss. Next, the chemist uses this device to measure the heat contribution from 0.454 kg (one 1 lb. package) of the peanut butter popcorn. Using 30.00 L of water, cooled now to 10oC, the final temperature of the water is 97.0oC after burning the popcorn. What is the caloric value of the package of popcorn (1 food calorie = 1 kilocalorie of energy? If the reservoir had only 5 L of water at 10oC, would the same combustion with the popcorn form some steam? Justify your answer mathematically
A food chemist is testing out a new calorimetry device that measures the caloric value of their company’s peanut butter popcorn. It does this by combusting the food and measuring the heat transfer to a reservoir of water. Important values: cwater = 4186 J/kg*oC; ρwaer = 1.00 g/mL; Lsteam = 2.26 x 106 J/kg; Tv = 100oC; 1 cal = 4.186 J If the reservoir of water contains 15.00 L of water at 20oC, what would be its temperature after absorbing the energy from combusting 0.250 kg of simple carbohydrates? Assume that the energy contribution from combusting a simple carbohydrate is 4.00 kilocalories/gram and that there is no loss. Next, the chemist uses this device to measure the heat contribution from 0.454 kg (one 1 lb. package) of the peanut butter popcorn. Using 30.00 L of water, cooled now to 10oC, the final temperature of the water is 97.0oC after burning the popcorn. What is the caloric value of the package of popcorn (1 food calorie = 1 kilocalorie of energy? If the reservoir had only 5 L of water at 10oC, would the same combustion with the popcorn form some steam? Justify your answer mathematically
A food chemist is testing out a new calorimetry device that measures the caloric value of their company’s peanut butter popcorn. It does this by combusting the food and measuring the heat transfer to a reservoir of water.
Important values: cwater = 4186 J/kg*oC; ρwaer = 1.00 g/mL; Lsteam = 2.26 x 106 J/kg; Tv = 100oC; 1 cal = 4.186 J
If the reservoir of water contains 15.00 L of water at 20oC, what would be its temperature after absorbing the energy from combusting 0.250 kg of simple carbohydrates? Assume that the energy contribution from combusting a simple carbohydrate is 4.00 kilocalories/gram and that there is no loss.
Next, the chemist uses this device to measure the heat contribution from 0.454 kg (one 1 lb. package) of the peanut butter popcorn. Using 30.00 L of water, cooled now to 10oC, the final temperature of the water is 97.0oC after burning the popcorn. What is the caloric value of the package of popcorn (1 food calorie = 1 kilocalorie of energy?
If the reservoir had only 5 L of water at 10oC, would the same combustion with the popcorn form some steam? Justify your answer mathematically
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