Chemistry In Focus
6th Edition
ISBN: 9781305084476
Author: Tro, Nivaldo J., Neu, Don.
Publisher: Cengage Learning
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Chapter 9, Problem 36E
Interpretation Introduction
Interpretation:
The yearly cost of operating each of the given devices is to be determined.
Concept introduction:
Unit conversion is defined as the process in which multiple steps are used to convert the unit of measurement for the same given quantity. It is determined by multiplication with a conversion factor.
The fraction in which numerator and denominator are the same quantities but are determined in different units, is known as a conversion factor.
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When an electrical appliance whose power usage is X watts is run for Y seconds, it uses X × Y joules of energy. The energy unit used by electrical utilities in their monthly bills is the kilowatt-hour (kWh, that is, 1 kilowatt used for 1 hour). How many joules are there in a kilowatt-hour? If electricity costs $.09 per kilowatt-hour, how much does it cost per megajoule?
A company pays the electric company at a rate of $0.18 per kilowatt-hour for their power. The factory uses three ventilator fans to keep the workers safe from dust. Each fan has a 1 horsepower motor. The company runs the fans continuously 24/7. How much is the company’s energy cost per month (30 days) to operate the ventilation system?
In Table 7.2 (Energy Expenditure of a 180-Pound Person During Selected Exercises)Links to an external site. in the course textbook, it is claimed that a person climbing stairs expends about 1200 kcal/hr. The maximum human power output for short-term effort is approximately 1200 W (remember 1 W = 1 J/s).
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Group of answer choices
It comes out to be 1400 W, which is too high
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Chapter 9 Solutions
Chemistry In Focus
Ch. 9 - Conversion of Energy Units The complete combustion...Ch. 9 - Calculating Energy Use in Kilowatt-Hours What is...Ch. 9 - Prob. 9.3YTCh. 9 - Enthalpy of Reaction How much energy in...Ch. 9 - Prob. 9.5YTCh. 9 - Prob. 1SCCh. 9 - Prob. 2SCCh. 9 - Prob. 3SCCh. 9 - Prob. 4SCCh. 9 - When two solutions are mixed in a beaker, a...
Ch. 9 - Prob. 1ECh. 9 - From a molecular standpoint, explain how thermal...Ch. 9 - Prob. 3ECh. 9 - Prob. 4ECh. 9 - Prob. 5ECh. 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 - Prob. 9ECh. 9 - Prob. 10ECh. 9 - Define each of the following terms: a. heat b....Ch. 9 - Prob. 12ECh. 9 - What happens to the temperature of the...Ch. 9 - Prob. 14ECh. 9 - Prob. 15ECh. 9 - Prob. 16ECh. 9 - Prob. 17ECh. 9 - Prob. 18ECh. 9 - Prob. 19ECh. 9 - What are the environmental problems associated...Ch. 9 - Prob. 21ECh. 9 - Prob. 22ECh. 9 - What is the major cause of acid rain?Ch. 9 - Explain how acid rain is formed and its effects on...Ch. 9 - Prob. 25ECh. 9 - Prob. 26ECh. 9 - Prob. 27ECh. 9 - Prob. 28ECh. 9 - Prob. 29ECh. 9 - Which fossil fuel is the worst offender when it...Ch. 9 - Prob. 31ECh. 9 - Prob. 32ECh. 9 - Prob. 33ECh. 9 - Prob. 34ECh. 9 - Assume that electricity costs 15 cents per...Ch. 9 - Prob. 36ECh. 9 - Prob. 37ECh. 9 - Prob. 38ECh. 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 - Prob. 42ECh. 9 - Prob. 43ECh. 9 - Prob. 44ECh. 9 - Prob. 45ECh. 9 - Prob. 46ECh. 9 - Prob. 47ECh. 9 - Prob. 48ECh. 9 - Calculate the amount of carbon dioxide (in kg)...Ch. 9 - Prob. 50ECh. 9 - The second law of thermodynamics has been called...Ch. 9 - You are camping and contemplating placing some hot...Ch. 9 - Prob. 56ECh. 9 - Prob. 57ECh. 9 - Prob. 58E
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