Laboratory Manual Chemistry in Context
8th Edition
ISBN: 9780073518121
Author: American Chemical Society
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 8, Problem 21Q
Every year, 5.6 × 1021 kJ of energy comes to Earth from the Sun. Why can’t this energy be used to meet all of our energy needs?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
How many kilojoules of energy would have to evolve from this reaction if the total mass of the products could be no greater than
99.99900 g? i
! kJ
If 5.67 x 104 grams of sodium (MW = 23.00 g/mol) were reacted as illustrated below, how much energy would be released?
2 Na (s) + 2 H2O (l ) → 2 NaOH (aq) + H2 (g) ΔH = -368.4 kJ
The combustion of methane is described by the equation in the figure. How
much energy would be released when 2.00 mole of methane is combusted? *
AH = -890 kJ / mol
+202(g)
4(g)
→ COx, +2H,0)
Chapter 8 Solutions
Laboratory Manual Chemistry in Context
Ch. 8.1 - Prob. 8.3YTCh. 8.1 - Prob. 8.4YTCh. 8.3 - Prob. 8.9CTCh. 8.4 - Prob. 8.10CTCh. 8.4 - Prob. 8.11SCCh. 8.5 - Prob. 8.13SCCh. 8.5 - Prob. 8.14CTCh. 8.6 - Prob. 8.16CTCh. 8.7 - Prob. 8.17CTCh. 8.7 - Prob. 8.18YT
Ch. 8.7 - Prob. 8.21CTCh. 8.8 - Prob. 8.23CTCh. 8 - Prob. 1QCh. 8 - Prob. 2QCh. 8 - Which chemical species gets oxidized and which...Ch. 8 - What is the difference between a galvanic cell and...Ch. 8 - Two common units associated with electricity are...Ch. 8 - Consider the galvanic cell pictured. A coating of...Ch. 8 - Prob. 7QCh. 8 - a. How does the voltage from a tiny AAA alkaline...Ch. 8 - Prob. 9QCh. 8 - The mercury battery has been used extensively in...Ch. 8 - Prob. 12QCh. 8 - During the conversion of O2(g) to H2O(l) in a fuel...Ch. 8 - How does the reaction between hydrogen and oxygen...Ch. 8 - This diagram represents the hydrogen fuel cell...Ch. 8 - What is a PEM fuel cell? How does it differ from...Ch. 8 - In addition to hydrogen, methane also has been...Ch. 8 - Prob. 18QCh. 8 - Potassium and lithium both are reactive Group 1...Ch. 8 - What challenges keep hydrogen fuel cells from...Ch. 8 - Every year, 5.6 1021 kJ of energy comes to Earth...Ch. 8 - Prob. 22QCh. 8 - Prob. 23QCh. 8 - Prob. 24QCh. 8 - Prob. 25QCh. 8 - Consider these three sources of light: a candle, a...Ch. 8 - Prob. 27QCh. 8 - What is the difference between an electrolytic...Ch. 8 - Provide some differences between a leadacid...Ch. 8 - Prob. 30QCh. 8 - The company ZPower is promoting its silverzinc...Ch. 8 - Prob. 32QCh. 8 - Prob. 33QCh. 8 - You never need to plug in Toyotas gasolinebattery...Ch. 8 - Prob. 35QCh. 8 - What is the tragedy of the commons? How does this...Ch. 8 - Hydrogen is considered an environmentally friendly...Ch. 8 - Fuel cells were invented in 1839 but never...Ch. 8 - Hydrogen and methane both can react with oxygen in...Ch. 8 - Engineers have developed a prototype fuel cell...Ch. 8 - How can the principles of green chemistry be...Ch. 8 - Prob. 42QCh. 8 - Prob. 43QCh. 8 - Small quantities of hydrogen gas can be prepared...Ch. 8 - Prob. 45QCh. 8 - Prob. 46QCh. 8 - Prob. 47QCh. 8 - Prob. 48QCh. 8 - Although Alessandro Volta is credited with the...Ch. 8 - Prob. 50QCh. 8 - If all of todays technology presently based on...Ch. 8 - Prob. 52QCh. 8 - Prob. 53QCh. 8 - Prob. 54QCh. 8 - Prob. 55Q
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Energy consumption in the United States amounts to the equivalent of the energy obtained by burning 7.0 gal of oil or 70. lb of coal per day per person. Using data in Table 20.4, carry out calculations to show that the energy evolved from these quantities of oil and coal is approximately equivalent. The density of fuel oil is approximately 0.8 g/mL. (1.00 gal = 3.785 L and 1.00 lb = 454 g)arrow_forwardConsider the accompanying diagram. Ball A is allowed to fall and strike ball B. Assume that all of ball As energy is transferred to ball B at point I, and that there is no loss of energy to other sources. What is the kinetic energy and the potential energy of ball B at point II? The potential energy is given by PE = mgz, where m is the mass in kilograms, g is the gravitational constant (9.81 m/s2), and z is the distance in meters.arrow_forwardGiven: 4 NH3 (g) + 3 O2 (g) → 2 N2 (g) + 6 H2O (l) ΔH = -1500 kJ How many grams of ammonia (MM = 17.03 g/mol) need to be reacted in order to release 4.50 x 104 kJ of energy?arrow_forward
- Calculate the amount of mass in nanograms that is changed into energy when one mole of liquid water forms, all measurements being made at 1 atm and 25 °C. Am = ngarrow_forwardThe sun supplies energy at a rate of about 1.0 kilowatt per square meter of surface area (1 watt =1 J/s). The plants in an agricultural field produce the equivalent of 13 kg of sucrose (C12 H22 O11) per hour per hectare (1 ha : 10,000 m²). Assuming that sucrose is produced by the reaction 12CO2 (g) + 11H2O(1) → C12 H22 O11 (s) + 1202 (g) AH=5640 kJ calculate the percentage of sunlight used to produce the sucrose that is, determine the efficiency of photosynthesis in this field. Percent efficiency %arrow_forwardFor the following reaction, what is the energy released, in GJ/mol? (1 GJ = 1E9 J) Use 2.998E8 m/s as the speed of light 1 a m u has a mass of 1.6605E-27 kg A + B → C + D A B C D mass (amu) 3.1885 6.3548 4.1791 5.1353 Express your answer as a positive valuearrow_forward
- 4 Read the following sentence: "When the sun's rays hit a plant's leaves, the plant is able to transform that light-or solar energy-into chemical energy that is then used as fuel." Based on the evidence above, what conclusion can be made? A- This causes plants to produce light. B-- Plants can turn food into solar energy. C-- Photosynthesis only occurs at night. D- Plants need the sun to make food.arrow_forwardWhat is the theoretical yield of ammonia (in grams) if 16.55 grams of nitrogen gas and 10.15 grams of hydrogen gas are allowed to react? The enthalpy of this reaction is 92.22 kj. Use dimensional analysisarrow_forwardEnergy cannot be created nor destroyed, but it can be transferred between a reaction and its surroundings. The change in energy, AE, is positive if the reaction absorbs energy, and it is negative if the reaction releases energy. You may also see this expressed in terms of change in internal energy, AU. For the purposes of this question, AU and AE are equal. One way a reaction can transfer energy to or from the surroundings is by releasing or absorbing heat. A reaction can also transfer energy, in the form of work, through a change in volume. The total change in energy is the sum of the heat and work: AE=q+w At constant pressure, q = and so AH and w=-. - PAV AE=AH - PAV Part A Assuming constant pressure, rank these reactions from most energy released by the system to most energy absorbed by the system, based on the following descriptions: A. Surroundings get colder and the system decreases in volume. B. Surroundings get hotter and the system expands in volume. C. Surroundings get hotter…arrow_forward
- Using your cars miles per gallon and the miles you drive in 1 week calculate the liters of carbon dioxide you produce when using your car. Compare your miles in February (pre-covid) versus June (post-covid). Assume that your engine combusts at 1.00 atm and 25.0 celsius. Assume that your gasoline is 100% octane (C8H18). You will also need to balance the combustion reaction that occurs in your car engine. You will need to use PV=nRT I think calculations are not correct specially for June. please help 2C8H18+ 25O2→16CO2+18H2O Feb, (pre covid), Miles covered per week=15×7=105 miles So fuel consumed per week=105 miles/30 miles ga =3.5 ga Density of octane=3.18 kg/ga Mass=volume × density Mass of Octane used per week = 3.5 ga x 3.18 kg/ga =11.13 kg Moles of octane in 11.13 kg 11.13 kg/114 kg/k mol =0.097 kmol 2 kmol octan≡16 kmol CO2 0.097 kmol octane =16/2 × 0.097 kmol CO2 0.097 kmol octane = 0.781 kmol CO2 n= 0.781 kmol=781 moles CO2 V=781 mol x 8.314j/k. mol x (25+273)K/1atm x…arrow_forwardHow much energy is required to produce 1.00 kg of aluminum by the reaction 2 Al2O3(s) + 3 C(s) + 1.97 × 103 kJ → 4 Al(s) + 3 CO2(g)?arrow_forwardCalculate the heat (in kJ) associated with 246 g of white phosphorus burning in air according to the equation P4(s) + 502(g) → P4O10(s) AH =-3013 kJ / molarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- General Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
- 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 LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
General Chemistry - Standalone book (MindTap Cour...
Chemistry
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Cengage Learning
Introductory Chemistry: A Foundation
Chemistry
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Chemistry: The Molecular Science
Chemistry
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:Cengage Learning
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
Chemistry & Chemical Reactivity
Chemistry
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:Cengage Learning
Calorimetry Concept, Examples and Thermochemistry | How to Pass Chemistry; Author: Melissa Maribel;https://www.youtube.com/watch?v=nSh29lUGj00;License: Standard YouTube License, CC-BY