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- As of 2018, -95% of hydrogen is produced from fossil fuels. One of the most important reactions of this type is the steam reforming of methane (CHA). Write a balanced chemical equation based on the following description: gaseous methane reacts with steam to form carbon monoxide and hydrogen gases. 3c, 2- Reset 1 3 4 7 9 -> (s) (1) (g) (aq) H. Но СНО Не Co x H20 00 LOA gas consisting only of CO and N2 is made by passing a mixture of flue gas and air through a bed of incandescent coke (assume pure carbon). The two reactions that occur both go to completion: CO2 + C-2CO h AH,,298 172.46 kJ/mol - 221.05 kJ/mol -- ΔΗ,,298 The flue gas composition is 12.8 mol% CO, 3.7 mol % CO2, 5.4 mol % O2, and 78.1 mol % N₂. The flue gas/air mixture is so proportioned that the heats of the two reactions cancel. If the feed stream is preheated to 875 °C, and the temperature of the coke bed is therefore constant at 875 °C. If the process is adiabatic, what ratio of moles of flue gas to moles of air is required. 2C+02 → 2CO - = AH. Pl Mixer Coke Flue gas AirThe 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 18 kg of sucrose (C12H22O11) per hour per hectare (1 ha=10,000meters squared). Assuming that sucrose is produced by the reaction 12CO2(g)+11H2O(l)>>>C12H22O11(s)+12O2(g) ?H= 5640kJ calculate the percentage of sunlight used to produce the sucrose – that is, determine the efficiency of photosynthesis in this field. Percent efficiency = %
- Sucrose, C12 H22011, is common table sugar. The enthalpy change at 25°C and 1 atm for the complete burning of 2 mol of sucrose in oxygen to give CO2(9) and H2O(1) is - 1.128 x 10* k. From this and from data given below: AH (H2O(1) = -285.8 kJ/mol AH (CO2(9)) = -393.5 kJ/mol AH (O2(9) = 0 kJ/mol Calculate the standard enthalpy of formation of sucrose. AH; =| K/mol(C) Write applications of bio-diesel.It is estimated that the net amount of carbon dioxide fixed by photosynthesis on the landmass of earth is 5.5*1016 g/yr of CO2. Assume that all this carbon is converted into glucose. Calculate the energy stored by photosynthesis on land per year, in KJ. Calculate the average rate of conversion of solar energy into plant energy in megawatts, MW. A large nuclear power plant produces about 103 MW. The energy of how many such nuclear power plants is equivalent to the solar energy conversion?
- Consider the balanced reaction 4 A + 4 B → 5C+ 6 D. If 5.577 moles of C (MW = 36.53) are produced, how many grams of A (MW%3D 47.16) are consumed? Report your answer to three decimal places (ignore significant figures).Sucrose is oxidized according to the following formula. C12H22O11 + O2 → CO2 + H2O You are investigating cellular metabolism in vitro. Under your experimental conditions, you plate 12 million cells in a dish using 10 ml of cell culture media. You grow the cells in a special instrument that can measure metabolic gases. After 24 hours, you instrument has detected that 28.8 mg of oxygen have been consumed and the same mass of carbon dioxide released. Your previous tests have shown that these cells consume 75 μg/106 cells-h. (a) Determine the limiting reagent, (b) percent excess of the other reagent, percent conversion for both reactants, and (c)extent of reaction (ξ). (d) Your initial concentration of sucrose in your cell culture media is 13.0mM. Your instrumentation can only resolve sucrose concentration at 0.1 mM increments. Can you detect the change in sucrose concentration with your instrumentation?consider the following balancing process at 700c 2H2 (g) + 2s2 (g) 《》 2H2 (g) An analysis shows that there are 2.5 moles of H2, 135 × 10 ^ -5 moles of S2 and 8.70 moles of H2S contained in a 12-liter flask calculating Kc and Kp
- NIG 2 H₂(g) + O2(g) → 2 H₂O(g) IO AH°--241.8KJ, 促 ASO = -88.85. Assuming AHO=AH and AS-AS, calculate the temperature criterion for spontaneity. Indicate the min. or max temp. required for OROKA spontaneity. T₁S2T=AH HO For this ran, дноA chemical engineer must calculate the maximum safe operating temperature of a high pressure gas reaction vessel, The vessel is a stainless-steel cylinder that measures 17.0 cm wide and 20.4 cm high. The maximum safe pressure inside the vessel has been measured to be 6.10 MPA For a certain reaction the vessel may contain up to 0.755 kg of sulfur hexafluoride gas. Calculate the maximum safe operating temperature the engineer should recommend for this reaction, Write your answer in degrees Celsius. Be sure your answer has the correct number of significant digitsEsc ||| = OTHERMOCHEMISTRY A student runs two experiments with a constant-volume "bomb" calorimeter containing 1200. g of water (see sketch at right). Calculating heat of reaction from bomb calorimetry data First, a 5.000 g tablet of benzoic acid (C6H,CO₂H) is put into the "bomb" and burned completely in an excess of oxygen. (Benzoic acid is known to have a heat of combustion of 26.454 kJ/g.) The temperature of the water is observed to rise from 16.00 °C to 38.96 °C over a time of 9.2 minutes. 2 4. Next, 5.730 g of acetaldehyde (C₂H₂O) are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 16.00 °C to 42.19 °C. 84°F Sunny Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: FI Explanation Is this reaction exothermic, endothermic, or neither? 4- F₂ Check 2C₂H4O(g) + 50₂(g) 4CO₂(g) + 4H₂O(g) Be sure any of your answers that are…