Chemistry in Context
8th Edition
ISBN: 9780073522975
Author: American Chemical Society
Publisher: McGraw-Hill Education
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Chapter 4, Problem 9Q
Mercury (Hg) is present in trace amounts in coal, ranging from 50–200 ppb. Consider the amount of coal burned by the power plant in Your Turn 5.19. Calculate tons of mercury in the coal based on the lower (50 ppb) and higher (200 ppb) concentrations.
- a. Assuming the composition of coal can be approximated by the formula C135H96O9NS, calculate the mass of carbon (in tons) in 1.5 million tons of coal. This quantity of coal might be burned by a typical power plant in 1 year.
- b. Compute the amount of energy (in kJ) released by burning this mass of coal. Assume the process releases 30 kJ/g of coal. Useful conversion factors: 1 ton = 2000 lb and 1 pound = 454 g.
- c. What mass of CO2 would be formed by the complete combustion of 1.5 million tons of this coal?
Hint: In the balanced chemical equation, assume a mole ratio of coal:CO2 of 1:135.
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Chapter 4 Solutions
Chemistry in Context
Ch. 4.1 - Although power plants require several steps to...Ch. 4.1 - Prob. 4.3YTCh. 4.2 - Prob. 4.5CTCh. 4.3 - Prob. 4.7CTCh. 4.3 - Prob. 4.9YTCh. 4.4 - Prob. 4.10CTCh. 4.4 - The combustion of one gram of natural gas releases...Ch. 4.4 - Prob. 4.12CTCh. 4.5 - Prob. 4.14SCCh. 4.5 - Scientific Practices Coal Versus Ethanol On the...
Ch. 4.6 - Prob. 4.17YTCh. 4.7 - Beginning in the 1920s, the octane-booster...Ch. 4.9 - Prob. 4.21CTCh. 4.10 - Prob. 4.22CTCh. 4.11 - Have you ever been served cherries Jubilee or...Ch. 4.11 - Prob. 4.26CTCh. 4 - Prob. 4.1CTCh. 4 - Prob. 1QCh. 4 - Prob. 2QCh. 4 - Prob. 3QCh. 4 - Energy exists in different forms in our natural...Ch. 4 - A coal-burning power plant generates electrical...Ch. 4 - Prob. 6QCh. 4 - Prob. 7QCh. 4 - Prob. 8QCh. 4 - Mercury (Hg) is present in trace amounts in coal,...Ch. 4 - Prob. 10QCh. 4 - Here are the condensed structural formulas for two...Ch. 4 - Prob. 12QCh. 4 - Prob. 13QCh. 4 - Prob. 14QCh. 4 - During petroleum distillation, kerosene and...Ch. 4 - Prob. 16QCh. 4 - a. Write the balanced chemical equation for the...Ch. 4 - Prob. 18QCh. 4 - Prob. 19QCh. 4 - State whether these processes are endothermic or...Ch. 4 - Use the bond energies in Table 5.1 to calculate...Ch. 4 - Use the bond energies in Table 5.1 to calculate...Ch. 4 - Ethanol can be produced by fermentation. Another...Ch. 4 - Here are structural formulas for ethane, ethene...Ch. 4 - These three compounds all have the same chemical...Ch. 4 - Catalysts speed up cracking reactions in oil...Ch. 4 - Explain why cracking is a necessary part of the...Ch. 4 - Consider this equation representing the process of...Ch. 4 - Prob. 29QCh. 4 - Consider these three alcohols: methanol, ethanol,...Ch. 4 - Prob. 31QCh. 4 - Prob. 32QCh. 4 - Prob. 33QCh. 4 - Compare and contrast a molecule of biodiesel with...Ch. 4 - Use Figure 5.6 to compare the energy released for...Ch. 4 - Prob. 36QCh. 4 - The sustainability of burning coal (and other...Ch. 4 - In this chapter, we approximated the chemical...Ch. 4 - Prob. 39QCh. 4 - Compare the processes of combustion and...Ch. 4 - How might you explain the difference between...Ch. 4 - Write a response to this statement: Because of the...Ch. 4 - The concept of entropy and probability is used in...Ch. 4 - Bond energies such as those in Table 5.1 are...Ch. 4 - Use the bond energies in Table 5.1 to explain why...Ch. 4 - Prob. 46QCh. 4 - Prob. 47QCh. 4 - Prob. 48QCh. 4 - Prob. 49QCh. 4 - Prob. 50QCh. 4 - Prob. 51QCh. 4 - Prob. 52QCh. 4 - Prob. 53QCh. 4 - Use a diagram to show the relationship among these...Ch. 4 - On a timescale of a few years, the combustion of...Ch. 4 - Prob. 56QCh. 4 - Emissions of some pollutants are lower when...Ch. 4 - Although coal contains only trace amounts of...Ch. 4 - Prob. 59QCh. 4 - An article in Scientific American pointed out that...Ch. 4 - C. P. Snow, a noted scientist and author, wrote an...Ch. 4 - Chemical explosions are very exothermic reactions....Ch. 4 - Prob. 64QCh. 4 - Tetraethyllead (TEL) was first approved for use in...Ch. 4 - Tetraethyllead (TEL) has an octane rating of 270....Ch. 4 - Another type of catalyst used in the combustion of...Ch. 4 - Figure 5.8 shows energy differences for the...Ch. 4 - Prob. 69Q
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