Measuring Calories Lab

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ual05z

Science

Description

I have a lab report that needs to be completed. Experiment results are listed. Only the calculatons need to be done and filled in.

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Explanation & Answer

Please see the following file:

1.
Category

Glycine
C2H5NO2
Sucrose
C12H22O11
Stearic acid
C18H36O2
Ethanol
C2H5OH

Enthalpy of
combustion
(kJ/mol)
-969

Enthalpy of
combustion
(kcal/mol)
-231

Molar mass
(g/mol)

Calories per
gram (kcal/g)

75.07

3.09

Carbohydrate

-5,645

-1,349

342.3

3.94

Fat

-11,407

-2,726

284.48

9.58

Alcohol

-1,368

-327

46.07

7.10

Protein

The following results support the nutritional guidelines which state that the calorific values for different
food groups are: 9 Cal/g fat, 7 Cal/g alcohol, 4 Cal/g carbohydrates, 4 Cal/g protein. These values are
very similar to the values in the table. (It should be noted that 1 kcal/g = a Cal/g)

2.

Calories per servin...


Anonymous
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