
Assume that electricity costs 15 cents per kilowatt- hour. Calculate the monthly cost of operating each of the following:
a 100 W light bulb, 5 h/day
a 600 W refrigerator, 24 h/day
a 12,000 W electric range, 1 h/day
a 1000 W toaster, 10 min/day

Interpretation:
The monthly cost of operating each of the given cases 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.
Since, 1 kW is equal to 1000 W, hence, conversion factor is as follows:
Answer to Problem 35E
Solution:
Explanation of Solution
a) A 100 W light bulb, 5 h/day
The electricity cost is
Conversion of watt into kilowatt is as follows:
In one month, there are
In one day, the consumption is
The cost of electricity for one kilowatt-hour is
Therefore, the monthly cost is
b)
The electricity cost is
Conversion of watt into kilowatt is as follows:
In one month, there are
In one day, the consumption is
The cost of electricity for one kilowatt-hour is
Therefore, the monthly cost is
c)
The electricity cost is
Conversion of watt into kilowatt is as follows:
In one month, there are
In one day, the consumption is
The cost of electricity for one kilowatt-hour is
Therefore, the monthly cost is
d)
The electricity cost is
Conversion of watt into kilowatt is as follows:
In one month, there are
In one day, the consumption is
The cost of electricity for one kilowatt-hour is
Therefore, the monthly cost is
Want to see more full solutions like this?
Chapter 9 Solutions
Owlv2 With Mindtap Reader, 1 Term (6 Months) Printed Access Card For Tro's Chemistry In Focus: A Molecular View Of Our World, 7th
- 9. Write Me product as well as the reaction Mechanism For each of the Following Vanctions +H₂504 4.50+ T C. +212 Fellz 237 b. Praw the potential energy Diagrams For each OF Mese Rauctions and account For any differences that appear in the two potential Puergy Diagrams which of here two reactions 19 Found to be Reversable, Rationalice your answer based upon the venation mechanisms and the potential energy diagrams.arrow_forward9. Write Me product as well as the reaction Mechanism For each of the Following Veritious +H2504 4.50+ + 1/₂ Felly ◎+ 7 b. Praw he potential energy Diagrams For each OF Mese Ronctions and account for any differences that appeak in the two potential Puergy Diagramsarrow_forwardDraw the major product of this reaction. Ignore inorganic byproducts. Incorrect, 3 attempts remaining 1. excess Br2, NaOH 2. neutralizing workup Qarrow_forward
- Given the electrode Pt | Ag | Ag+ (aq), describe it.arrow_forwardAt 25°C, the reaction Zn2+ + 2e ⇄ Zn has a normal equilibrium potential versus the saturated calomel electrode of -1.0048 V. Determine the normal equilibrium potential of Zn versus the hydrogen electrode.Data: The calomel electrode potential is E° = 0.2420 V versus the normal hydrogen electrode.arrow_forwardElectrochemistry. State the difference between E and E0.arrow_forward
- In an electrolytic cell, the positive pole is always assumed to be on the right side of the battery notation. Is that correct?arrow_forwardIn an electrolytic cell, the positive pole is always assumed to be on the right side of the battery. Is that correct?arrow_forwardCalculate the free energy of formation of 1 mol of Cu in cells where the electrolyte is 1 mol dm-3 Cu2+ in sulfate solution, pH 0. E° for the Cu2+/Cu pair in this medium is +142 mV versus ENH.Assume the anodic reaction is oxygen evolution.Data: EH2 = -0.059 pH (V) and EO2 = 1.230 - 0.059 pH (V); 2.3RT/F = 0.059 Varrow_forward
- If the normal potential for the Fe(III)/Fe(II) pair in acid at zero pH is 524 mV Hg/Hg2Cl2 . The potential of the saturated calomel reference electrode is +246 mV versus the NHE. Calculate E0 vs NHE.arrow_forwardGiven the galvanic cell whose scheme is: (-) Zn/Zn2+ ⋮⋮ Ag+/Ag (+). If we know the normal potentials E°(Zn2+/Zn) = -0.76V and E°(Ag+/Ag) = 0.799 V. Indicate the electrodes that are the anode and the cathode and calculate the E0battery.arrow_forwardIndicate the functions that salt bridges have in batteries.arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
- Chemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry: An Atoms First ApproachChemistryISBN:9781305079243Author:Steven S. Zumdahl, Susan A. ZumdahlPublisher:Cengage Learning





