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Benzoic has been hypothesised as a main pollutant from vehicular exhaust and subsequent product from photochemical reactions.A biodegradation research of benzoic acid was conducted by inoculating mixed bacterial strains into a culture broth containing benzoic acid to reduce the chemical's environmental deterioration. The following
C6H5COOH+aO2+bNH3 →cC5H7NO2+dH2O+eCO2
1)If RQ = 0.75, find a, b, c, d, and e
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- Silicon forms a series of compounds analogous to the al-kanes and having the general formula SinH2n+2. The first of these compounds is silane, SiH4, which is used in the electronics industry to produce thin ultrapure silicon films. SiH4(g) is somewhat difficult to work with because it is py-ropboric at room temperature—meaning that it bursts into flame spontaneously when exposed to air. (a) Write an equation for the combustion of SiH4(g). (The reaction is analogous to hydrocarbon combustion, and SiO2 is a solid under standard conditions. Assume the water produced will be a gas.) (b) Use the data from Appendix E to calculate ? for this reaction. (c) Calculate G and show that the reaction is spontaneous at 25°C. (d) Compare G for this reaction to the combustion of methane. (See the previous problem.) Are the reactions in these two exercises enthalpy or entropy driven? Explain.One of the components of polluted air is NO. It is formed in the high-temperature environment of internal combustion engines by the following reaction: N2(g)+O2(g)2NO(g)H=180KJ Why are high temperatures needed to convert N2 and O2 to NO?explain the combustion of methane gasCOMBUSTION OF METHANE GAS:CH4 + 2O2 → CO2 + 2H2O + Energy
- In a transesterification reaction, a triglyceride reacts with an alcohol to form an ester and glycerol. Many students learn about the reaction between methanol (CH3OH) and ethyl acetate (CH3CH2OCOCH3) as a sample reaction before studying the chemical reactions that produce biodiesel: CH3 OH + CH3 CH2 OCOCH3 ⟶ CH3 OCOCH3 + CH3 CH2 OHThe rate law for the reaction between methanol and ethyl acetate is, under certain conditions, determined to be: rate = k[CH3 OH]What is the order of reaction with respect to methanol and ethyl acetate, and what is the overall order of reaction?Ethylene (C2H4) plays an important role in the ripening of certain fruits and vegetables. It is sometimes supplemented under controlled conditions at produce—processing facilities but is also produced naturally by many fruit-bearing plants. Although the actual process by which plants produce ethylene is a complex one, imagine that it is produced by the simple breakdown of glucose according to the equation: C6H12O6 (s) à 3 C2H4 (g) + 3 O2 (g) Given S°= 212.1 J/molK, DG°= -910.56 kJ/mol and DH°= -1274.5 kJ/mol for C6H12O6 (s). a.) Determine the sign of DS° for the reaction. b.) Calculate DS° for the reaction. c.) Using the tabulated DG° values in the appendix, calculate DG° for the reaction. d.) Above what temperature (in °C) is the reaction spontaneous? Hint: you will first have to calculate DH° using tabulated values.Aspirin can be made in the laboratory by reacting acetic anhydride (C4H6O3) with salicylic acid (C7H6O3) to form aspirin (C9H8O4) and acetic acid (C2H4O2). The balanced equation is:C4H6O3+C7H6O3→C9H8O4+C2H4O2.In a laboratory synthesis, a student begins with 5.00 mL of acetic anhydride (density = 1.08 g / mL) and 2.08 g of salicylic acid. Once the reaction is complete, the student collects 2.17 g of aspirin. Determine the limiting reactant for the reaction. Express your answer as a chemical formula.
- Aspirin can be made in the laboratory by reacting acetic anhydride (C4H6O3) with salicylic acid (C7H6O3) to form aspirin (C9H8O4) and acetic acid (C2H4O2). The balanced equation is:C4H6O3+C7H6O3→C9H8O4+C2H4O2.In a laboratory synthesis, a student begins with 5.00 mL of acetic anhydride (density = 1.08 g / mL) and 2.08 g of salicylic acid. Once the reaction is complete, the student collects 2.14 g of aspirin. -Determine the limiting reactant for the reaction.Express your answer as a chemical formula. -Determine the theoretical yield of aspirin for the reaction. -The following reversible enzymatic reaction occurs in many areas of the body, but especially in red blood cells. The conversion of water and carbon dioxide into bicarbonate and hydrogen ions occurs through the action of an enzyme called carbonic anhydrase. Use the Law of Mass Action to predict which direction this equation will go under different circumstances. CO2 + H2O ↔ H+ + HCO3- Hyperventilating would increase the loss of carbon dioxide (CO2) from the blood. In what direction would the reaction above go in order to restore equilibrium? Left or right?Which of the following reactions represents an endothermic reaction? 2 SO3 (3) + 198 kJ → 2 SO2 (3) + O2 (g) 02 C,H6 + 702 2 (g) 4 CO2(2) + 6 H2O (1)+ (g) 3120 kJ O CHA (3) + 2O2 (8) → CO2 () + 2H2O (g) + 890 kJ 2 SO2 (e) 2S + 202 () +376 kJ (s) insert %23 2 "3 4 E R SID G H J K pause alt ト LL LLI
- 74 CHu + 2 Oze) CO2ig) + 2 H2O1n COue) +2 H;0n CHe) + 2 Oze) 2 C,H180 + 25 Ozug) 16 CO) + 18 H;Og 2 CH,OH, + 3 0ze) → 2C0u9+4H;0µ Which of the following is an endothermic reaction? * 2 C3H18(1) + 25 O218) → 16 CO218) + 18 H2O(g) 2 CH3OH) + 3 O2«) - 2 CO2e) + 4 H,O CO2ne) + 2 H2O) CHẠE) + 2 O2ie) CH4(g) + 2 O28) CO26) + 2 H2O)Q2. Carbonic Anhydrase or carbonic dehydratase is a family of metalloenzymes containing zinc (Zn) ion in its active site. Carbonic anhydrase can greatly increase the rate of this reaction, reaching a reaction rate of 104 - 106 per second. It is defined as the enzyme found in red blood cells, other parts of animals and plants, that breaks down carbonic acid with carbon dioxide and water. CO:(2) – H»O(1) – H.CO:(ag) For the carbonic anhydrase activity specified by the equation above, evaluate the standard reaction Gibbs energy at 25 °C?Mg(NO3)2+ (NH4)2C204→ Ca(NO3)2 + (NH4)2C2O4 – Sr(NO3)2 + (NH4)2C204 Ba(NO3)2 (NH4)2C2O4-
