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A piece of chocolate cake contains about 400 calories. A nutritional calorie is equal to 1000 calories (thermochemical calories), which is equal to 4.184 kJ. How many 8-in-high steps must a 180-lb man climb to expend the 400 Cal from the piece of cake? See Exercise 28 for the formula for potential energy.
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Chemistry: An Atoms First Approach
2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
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Chapter
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BuyFindarrow_forward
Chemistry: An Atoms First Approach
2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 7, Problem 130CP
Textbook Problem
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A piece of chocolate cake contains about 400 calories. A nutritional calorie is equal to 1000 calories (thermochemical calories), which is equal to 4.184 kJ. How many 8-in-high steps must a 180-lb man climb to expend the 400 Cal from the piece of cake? See Exercise 28 for the formula for potential energy.
Interpretation Introduction
Interpretation:
The chocolate cake piece required steps climb should be calculated.
Concept Introduction:
- Potential energy is the energy of an object due to position of it. For the gravitational potential energy is,
Equation:
Explanation of Solution
Explanation
Energy of a chocolate cake piece is
High of chocolate cake piece is
Weight of a man is
The given energy and height of a chocolate cake piece and weight of a man are recorded as shown above.
To calculate the energy of cake in
1000 calories of thermo chemical calories' equal to 4.184 kJ
- The given values are substitute in above equation to give the energy of cake in
- The energy of piece of cake is
To calculate the required energy for go up to 1 step
Chapter 7 Solutions
Chemistry: An Atoms First Approach
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