Determine the caloric energy content of the cocoa

Assignment Help Physics

Reference no: EM131346884

In a laboratory experiment, two engineering students are asked to determine the caloric value of a commercial brand of diet cocoa. They are provided with a bomb calorimeter, which had to be calibrated by measuring the heat liberated by a substance with a known heat of combustion. They elect to use benzoic acid, which has a known heat of combustion of 6.318 kcal/g. The test consists of igniting a tablet of the test material inside the bomb and measuring the temperature rise of the surrounding water.

The energy equivalent (EQ) of a bomb calorimeter is defined to be the product of the mass of the system multiplied by its specific heat. Then, the relation between the heat liberated by a test sample and the measured temperature change of the water is Q = EQ(T_final -T_initial).

a. If the change in temperature of the water was 2.905°C when a 1.1523 g tablet of benzoic acid is tested, determine the energy equivalent of the calorimeter.

b. Then, a 1.0825-g tablet of diet cocoa is tested and produces a temperature change of 1.699°C. Using the results of part a, determine the caloric energy content of the cocoa in kilocalories per gram.

Reference no: EM131346884

Questions Cloud

What is its average payment period : Assume a firm has a cash cycle of 58 days and an operating cycle of 86 days. What is its average payment period?

What is the length of the days sales in inventory : Scribble, Inc. has sales of $84,000 and cost of goods sold of $68,000. The firm had a beginning inventory of $14,000 and an ending inventory of $16,000. What is the length of the days' sales in inventory?

How would you characterize indigenous peoples : How would you characterize indigenous peoples in California prior to Spanish exploration and colonization? What were the similarities and differences between the native people?

How the preferred manner of learning and knowing among women : Examine how the preferred manner of learning and knowing among women and students of color often influence their experiences in schools as the schools are currently structured.

Determine the caloric energy content of the cocoa : Then, a 1.0825-g tablet of diet cocoa is tested and produces a temperature change of 1.699°C. Using the results of part a, determine the caloric energy content of the cocoa in kilocalories per gram.

Eliminating the daily snack food only : Eliminating the daily snack food only?- Eliminating the daily snack food plus eating only one of these meals per day?

Discuss the importance of developing skills in detecting : Interviewers must remain vigilant against deceptive behavior throughout the interview process and be aware of what drives witnesses and suspects to be forthcoming with accurate statements-the goal of all interviews and interrogations. Interviewees..

What will be their optimal cash replenishment level : Rose Resources faces a smooth annual demand for cash of $10.1 million; incurs transaction costs of $330 every time they sell marketable securities, and can earn 4.0 percent on their marketable securities. What will be their optimal cash replenishment..

What is the effect of a freeze that damages oranges : What is the effect of a freeze that damages oranges in Florida on the price of frozen orange juice in the United States and on the quantities of orange juice sold by Floridian and Brazilian firms?

User Account

All Pages