ESM 212 Assignment #3

ESM 212 Assignment #3 1. Nitrogen dioxide (NO2) concentrations are measured in an air-quality study and decrease from 10 ppmv to 6 ppmv in 3 min with a particular light intensity. a. What is the first-order rate constant for this reaction? 𝐼?𝑖?𝑖?? 𝐶?????????𝑖?? ?? ?? 2 [𝐴 ? ]: 10 ??? ? 𝐹𝑖??? 𝐶?????????𝑖?? ?? ?? 2 ????? ?𝑖??, "?" [𝐴 ? ]: 6 ??? ? 𝑇𝑖?? ????𝑖??? : 3?𝑖? 𝐶 ?? = 𝐶 ? 0 ? −?? 𝐶 ?? = ?𝑖??? ??????????𝑖?? 𝐶 ? 0 = 𝑖?𝑖?𝑖?? ??????????𝑖?? 6 ??? ? = 10 ??? ? ? −?(3) ? = − ?? 6 10 ( ) 3 = 0. 1703 1 ?𝑖? b. What is the half-life of NO2 during this study? ? 1/2 = ??(2) ? = 0.693 0.1703 1 ?𝑖? = 4. 07 ?𝑖? c. What would the rate constant need to be changed to in order to decrease the time required to lower the NO2 concentration from 10 ppmv to 6 ppmv in 1.5min? 𝐶 ? 0 = 10 ??? ? 𝐶 ?? = 6 ??? ? ? = 1. 5 ?𝑖? 𝐶 ?? = 𝐶 ? 0 ? −?? ? = − ?? 6 10 ( ) 1.5. = 0. 340 1 ?𝑖? 2. Based on the TEDx talk by David Klanecky, describe what each one of us can do to reduce air pollution (200 words maximum). The talk mentions a phone app you can use to check the air quality. Download the app (AirVisual) and locate 3 most polluted cities in the US. Describe the reason the app flagged them. Check your own city. How does pollution in those cities differ from your own city? (200 words maximum). Based on the TED talk with David Klanecky, each individual has the potential to reduce air pollution by the following methods: carpooling, walking more often, electric cars, etc. These are

all methods that can improve the quality of our air. Approximately 70,000 people die due to air pollution on a yearly basis. Transportation is one of the leading causes for air pollution. Most people do not recognize this and do not even consider the amount of greenhouse gasses that are emitted on a yearly, weekly, let alone a daily basis. Thus, high concentrations of people, high concentrations of vehicles will lead to more harmful impacts resulting from the air we breathe in. What other alternatives can we provide with one another to better aid when limiting the use of these fossil fuels? The speaker in this video makes the argument that in order to live safer, happier, and less polluted lives hopefully, we must grow more accustomed to the minor inconveniences that will be brought from less significant methods of transportation. One big example the speaker notes is Amazon prime. One delivery truck will be possibly wasting large amounts of carbon dioxide in order to handle and deliver your overnight shipping request. Being ok with these minor inconveniences will be able to help separate us from a more polluted future. Using the AirVisual app, I located Whittier Drive, New York City (LaGuardia Place & Bedford-Stuyvesant), and Hempstead Avenue 2 all as moderate air locations. These all can provide a much more improved quality of air and life using the methods as exemplified by speaker, Dan Klanesky. 3. A paint shop buys 52,000 liters of car paint based on VOC. In one year, they applied 50,800 liters of the same paint onto the products and the remainder turned out to become a waste. Assuming the waste is disposed of in an air-tight container and none accumulates in the shop or anywhere else, a. Determine the mass of VOCs entered into the atmosphere (in kg/year) if the density of paint is 8.30 lb/gallon and 75% by weight of VOCs are present in the paint. 52,000 liters of car paint Applied 50,800 liters (50. 8? 3 ): 𝑉????? ???? 1 ?? ?????? = 119. 826 ?? ? 3 Density = = 8. 30 ?? ?????? 994. 559 ?? ? 3 Weight = 75% Unused Paint = 52,000 - 50,800 = 1,200 liters of unused paint ( 1. 2? 3 ) Mass = Volume x Density ???? = 50. 8 (994. 559) ???? = 50, 523. 697 ?? ???? 𝑉?𝐶 ?ℎ?? 𝑖? ????: 75% ? 50, 523. 697 ?? ???? 0. 75 ? (50, 523. 697) = 37892. 698 ?? ????