BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

Solutions

Chapter
Section
BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 9, Problem 32E
Textbook Problem
64 views

A person obtains approximately 2 .5 × 10 3 Calories a day from his or her food. How much energy is that in

calories?

joules?

kilowatt-hours?

Interpretation Introduction

Interpretation:

The energy 2500 Calories/day is to be calculated in the given units.

Concept Introduction:

Unit conversion is defined as the process in which multiple steps are there and is used to convert the unit of measurement for the same given quantity. It is determined by multiply with a conversion factor.

The fraction in which numerator and denominator, both are the same quantities but are determined in different units is known as a conversion factor.

Explanation of Solution

a) Calories into cal.

Conversion of Calories into cal is as follows:

E= given Cal×1000 cal1 Cal(2500 Cal×1000 cal1Cal)=2.5×106 cal

Therefore, the result of the conversion is 2.5×106 cal.

b) calories into joules.

Conversion of calories into joules is as follows:

1 gram calorie=4.18 joule, Hence, conversion factor is as:

4.18 J1 cal

E= given Cal×1000 cal1 Cal×4.18 J1 cal(2500 Cal×1000 cal1 Cal×4.18 J1 cal)=1.0×107 J

Hence, the result of the conversion is 1.0×107.

c) calories into kWh

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Chapter 9 Solutions

Chemistry In Focus
Show all chapter solutions
add
Ch. 9 - What is the difference between a hot object and a...Ch. 9 - From a molecular standpoint, explain how thermal...Ch. 9 - From a molecular standpoint, explain what heat and...Ch. 9 - List the four sectors of U.S. energy consumption...Ch. 9 - How much energy does the United States consume...Ch. 9 - Explain the first law of thermodynamics and its...Ch. 9 - What is entropy? Why is entropy important?Ch. 9 - Explain the second law of thermodynamics and its...Ch. 9 - What is a perpetual motion machine? Why can such a...Ch. 9 - Approximately how efficient are each of the...Ch. 9 - Define each of the following terms: a. heat b....Ch. 9 - Explain the difference between energy and power.Ch. 9 - What happens to the temperature of the...Ch. 9 - Which temperature scale(s) does not contain...Ch. 9 - What is heat capacity? How is it related to...Ch. 9 - What are our current energy sources and their...Ch. 9 - How long will each of the energy sources in the...Ch. 9 - Why are fossil fuels so named? Where do they come...Ch. 9 - Explain how a fossil-fuel-burning power plant...Ch. 9 - What are the environmental problems associated...Ch. 9 - List the four major components of smog and the...Ch. 9 - What does a catalytic converter do?Ch. 9 - What is the major cause of acid rain?Ch. 9 - Explain how acid rain is formed and its effects on...Ch. 9 - Explain the natural greenhouse effect.Ch. 9 - What would happen to Earths temperature if there...Ch. 9 - What is global warming? Is it occurring? What is...Ch. 9 - What do computer-based climate models predict will...Ch. 9 - How much have CO2 levels increased in the last...Ch. 9 - Which fossil fuel is the worst offender when it...Ch. 9 - Energy Units Perform each of the following...Ch. 9 - A person obtains approximately 2.5103 Calories a...Ch. 9 - A chocolate chip cookie contains about 200 kcal....Ch. 9 - An average person consumes about 2.0103 kcal of...Ch. 9 - Assume that electricity costs 15 cents per...Ch. 9 - Assume that electricity costs 15 cents per...Ch. 9 - Temperature Units Perform each of the following...Ch. 9 - Perform each of the following conversions: a....Ch. 9 - The coldest temperature ever measured in the...Ch. 9 - The warmest temperature ever measured in the...Ch. 9 - Chemical Reactions and Energy Calculate the amount...Ch. 9 - Calculate how many grams of each of the following...Ch. 9 - The useful energy that comes out of an energy...Ch. 9 - A typical 1000-MW electrical generating power...Ch. 9 - Heating the air in a particular house by 10C...Ch. 9 - Heating the water in a 55-gallon water heater...Ch. 9 - Greenhouse Gas Emissions For problem 45, calculate...Ch. 9 - For problem 46, calculate how much CO2 in grams is...Ch. 9 - Calculate the amount of carbon dioxide (in kg)...Ch. 9 - The amount of CO2 in the atmosphere is...Ch. 9 - The second law of thermodynamics has been called...Ch. 9 - You are camping and contemplating placing some hot...Ch. 9 - Some people have criticized the idea that...Ch. 9 - In the 1950s, the United States produced about the...Ch. 9 - The following graph shows U.S. carbon dioxide...

Additional Science Textbook Solutions

Find more solutions based on key concepts
Show solutions add
The eating pattern that best provides nutrients- singles out a rich source for each nutrient and focuses on the...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Describe the respiratory mechanism for controlling blood pH.

Chemistry for Today: General, Organic, and Biochemistry

What is the difference between an isotope and an ion?

Horizons: Exploring the Universe (MindTap Course List)

What feature is unique to cnidarians? Name some cnidarians.

Oceanography: An Invitation To Marine Science, Loose-leaf Versin

A source vibrating at constant frequency generates a sinusoidal wave on a string under constant tension. II the...

Physics for Scientists and Engineers, Technology Update (No access codes included)