6. (a) Whatis, the difference betweenScience and GreenEnvironmentalChemistry?(b) How can a chemical process be madeenergy efficient?

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Answered: 6. (a) What is ther difference between…

6. (a) What is ther difference between Environmental Science and Green Chemistry? (b) How can a chemical process be made energy efficient?

General Chemistry - Standalone book (MindTap Course List)

11th Edition

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:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell

Chapter6: Thermochemisty

Section: Chapter Questions

Problem 6.47QP: Chlorine dioxide, ClO2, is a reddish yellow gas used in bleaching paper pulp. The average speed of a...

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Environmental
Chemistry?
(b) How can a chemical process be made
energy efficient?

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Chlorine dioxide, ClO2, is a reddish yellow gas used in bleaching paper pulp. The average speed of a ClO2 molecule at 25C is 306 m/s. What is the kinetic energy (in joules) of a ClO2 molecule moving at this speed?
3. (a) Using thermodynamics, explain the difference between a closed system and an open system. (b) State the first law in terms of internal energy of a system. In chemistry, why are changes in the enthalpy rather than internal energy used to study a chemical process. (c) State Hess's law.
(1) two baking sheets are made of different metals. you purchase both and bake a dozen cookies on each sheet at the same time in your oven. you observe that after 9 minutes, the cookies on one sheet are slightly burned on the bottom, whereas those on the other sheet are fine. (you are curious and you vary the conditions so you know the result is not caused by the oven.) (a) how can you use this observation to infer something about the specific heat of the materials in the baking sheets? (b) what is the mathematical reasoning (equation) that you need to support your conclusion?
Two positively charged spheres, each with a charge of 2.0x 10-5 C, a mass of 1.0 kg, and separated by a distance of 1.0 cm, are held in place on a frictionless track. (a) What is the electrostatic potential energy of this system? (b) If the spheres are released, will they move toward or away from each other? (c) What speed will each sphere attain as the distance between the spheres approaches infinity?
2. (a) The industrial process for the production of sulphuric acid has three steps. S (s) + O2 (g) → SO2 (g) AH° = -296.83 kJ 2SO3 (g) → 2SO2 (g) + O2 (g) AH° = -198.20 kJ SO3 (g) + H2O (1) → H2SO4 (1) AH° = -227.72 kJ Using the above data, calculate the enthalpy of the reaction, 2S (s) + 302 (g) + 2H2O (1) → 2H2SO4 (1)
The hydrocarbons acetylene (C2H2) and benzene (C6H6)have the same empirical formula. Benzene is an “aromatic”hydrocarbon, one that is unusually stable because of its structure.(a) By using data in Appendix C, determine the standardenthalpy change for the reaction 3 C2H2(g)-----> C6H6(l).(b) Which has greater enthalpy, 3 mol of acetylene gas or1 mol of liquid benzene? (c) Determine the fuel value, inkJ/g, for acetylene and benzene.
The lead-acid storage battery is the oldest rechargeable battery in existence. It was invented in 1859 by French physician Gaston Plante and still retains application todaY, more than 150 years later. There are two reactions that take place during discharge of the lead-acid storage battery. In one step, sulfuric acid decomposes to form sulfur trioxide and water: H, SO,() – SO;(9) + H,O() AH-+113. kJ In another step, lead, lead(IV) oxide, and sulfur trioxide react to form lead(II) sulfate: Pb(s) – PbO,(s) - 2 S0, (g) → 2 PbSO,(s) AH= -775. J Calculate the net change in enthalpy for the formation of one mole of lead(II) sulfate from lead, lead(IV) oxide, and sulfuric acid from these reactions. Round your answer to the nearest kJ.
2 (a) In this investigation, you will use a polystyrene-cup calorimter to determine the amount of heat released during acid-base neutralization reactions. Find information in your textbook, an encyclopedia, or a web site about calorimetry. Sketch the apparatus for a polystrene-cup calorimeter. (b) For more precise heat of reaction measurnments, chemists use a device called bomb calorimeter. How is a bomb calorimeter similar to and different from a polystyrene-cup calorimeter?
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Trinitroglycerin, C3H5N3O9(mostly referrred as nitroglycerin), has been widely used as an explosive. The enthalpy ipf decomposition at 1 atm pressure of trinitroglycerin to form nitrogen gas, carbon dioxide gas, liquid water, and oxygen gas @ 25 degrees C is-1541.4 kJ/mol. (a) Write the balance chemical equation for the decomposition of trinitroglycerin (b) Calculate the standard heat of formation of trinitroglycerin
(a) (c) HO OH 1. BH3 2. H₂O₂, NaOH 3. PCC 4. CH3MgBr 5. H3O+ workup Na₂Cr₂O7 H₂SO4, H₂O
(a) What is the electrostatic potential energy (in joules) betweenan electron and a proton that are separated by 53 pm?(b) What is the change in potential energy if the distanceseparating the electron and proton is increased to 1.0 nm?(c) Does the potential energy of the two particles increase ordecrease when the distance is increased to 1.0 nm?

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