Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0321908449
ISBN 13: 978-0-32190-844-5

Chapter 3 - Section 3.7 - Changes of State - Understanding the Concepts - Page 88: 3.62a

Answer

Carbohydrate: $500kcal$ Fat: $340 kcal$ Protein: $80 kcal$

Work Step by Step

Carbohydrate: According to the table 3.7 (Page 71), each g of carbohydrate gives 4 kcal. Calculate the total mass of carbohydrates: 29 g+51 g+44 g=124 g(Carbohydrate) Find the total energy: $124g \times \frac{4kcal}{1g} = 496kcal$ Don't forget to round off the numbers to the tens place: 500kcal. ----------- Fat: According to the table 3.7 (Page 71), each g of fat gives 9 kcal. Calculate the total mass of fat: 10.g+ 0g+ 28 g=38 g(Fat) Find the total energy: $38g \times \frac{9kcal}{1g} = 342 kcal$ Don't forget to round off the numbers to the tens place: 340kcal. ------------- Protein: According to the table 3.7 (Page 71), each g of protein gives 4 kcal. Calculate the total mass of protein: 13 g+ 0 g+ 8 g= 21 g(Protein) Find the total energy: $21 g \times \frac{4kcal}{1g} = 84 kcal$ Don't forget to round off the numbers to the tens place: 80kcal.
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