Oxidation of CIF by F2 yields liquid CIF3, an important fluorinating agent. Use the following gaseous thermochemical equations to calculate AH for the production of CIF3: rxn (1) 2 CIF(g)+O2(g)Cl20(g) + OF2(g) (2) 2 F2(g) + O2(g)2 OF2(g) (3) 2 CIF 3() 2 O2(g) Cl20(g) + 3 OF2(g) AH° 167.5 kJ AHo 43.5 kJ AHO 394.1 kJ
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- Oxygen is not normally found in positive oxidation states, but when it is combined with fluorine in the compound oxygen difluoride, oxygen is in a +2 oxidation state. Oxygen difluoride is a strong oxidizing agent that oxidizes water to produce O2 and HF. OF2(g) + H2O(g) → 2 HF(g) + O2(g) The standard formation enthalpy of oxygen difluoride is 24.5 kJ/mol. Using this information and data from Appendix J, calculate the standard reaction enthalpy for the reaction of oxygen difluoride with water. Table 4.2 Selected Standard Formation Enthalpies, ΔfH°, at 25°CEthylene (C₂H₄) is the starting material for the preparationof polyethylene. Although typically made during the processingof petroleum, ethylene occurs naturally as a fruit-ripening hor-mone and as a component of natural gas. (a) The heat of reactionfor the combustion of C₂H₄ is 1411 kJ/mol. Write a balancedthermochemical equation for the combustion of C₂H₄. (b) Howmany grams of C₂H₄ must burn to give 70.0 kJ of heat?5. What evidence of incomplete combustion would each of the following devices show? K/UA (a) a Bunsen burner (b) automobile exhaust tailpipe (c) a gas fireplace 6. Suggest an explanation for each of the following events: K/UA (a) Cottagers died in their sleep while heating their cottage using portable propane heaters designed for use on patios. (b) A cloud of black smoke belches from the exhaust stack of a truck as the truck starts to move. (c) A Bunsen burner flame changes from yellow to blue as the burner is adjusted. (d) A candle flame produces more smoke as an inverted jar is lowered over the candle.
- Coal-fired power plants emit CO2, which is one of the gases that is of concern with regard to global warming. A technique that power plants can adopt to keep most of the CO2 from entering the air is called CO2 capture and storage (CCS). If the incremental cost of the sequestration process is $0.019 per kilowatt-hour, what is the present worth of the extra cost over a 3-year period to a manufacturing plant that uses 100,000 kWh of power per month? The interest rate is 12% per year compounded quarterly.Magnetite, an iron ore with formula Fe3O4Fe3O4, can be reduced by treatment with hydrogen to yield iron metal and water vapor. This process requires 36 kcalkcal (151 kJkJ) for every 1.00 molmol of Fe3O4Fe3O4 reduced. How much energy (in kilocalories and kilojoules)) is required to produce 32 gg of iron?The same student wanted to determine the heat of dissolution for potassium chlorate (KClO3, MW: 122.55 g/mol) in water. He measured 10 grams of KClO3 and dissolved it in a calorimeter containing 250 g of water. The temperature drop was 3.5 K. 1. What is qH2O in Joules? A. +146.4 B. -146.4 C. -3661 D. +3661 2. What is qdissolution in Joules? A. +146.4 B. -146.4 C. -3661 D. +3661 3. What is the ΔHdissolution in kilojoules per mole? A. +44.866 B. -44.866 C. +1.794 D. -1.794 4. Is the reaction endothermic or exothermic? A. Endothermic B. Exothermic
- Calculate the heat required when 2.50 mol of A reacts with excess B and A2B according to the reaction:2A + B + A2B → 2AB + A2Given(on the photo):The same student wanted to determine the heat of dissolution for potassium chlorate (KClO3, MW: 122.55 g/mol) in water. He measured 10 grams of KClO3 and dissolved it in a calorimeter containing 250 g of water. The temperature drop was 3.5 K. a.) What is qH2O? b.) What is qrxn c.) What is ΔHrxn? d.) Is the reaction endothermic or exothermic?The same student wanted to determine the heat of dissolution for potassium chlorate (KClO3, MW: 122.55 g/mol) in water. He measured 10 grams of KClO3 and dissolved it in a calorimeter containing 250 g of water. The temperature drop was 3.5 K. What is qH2O? What is q of rxn? What is ΔHrxn? Is the reaction endothermic or exothermic?
- A Boeing 767-400ER traveling from Atalanta, Georgia (ATL) to Paris, France travels an average distance of 4394 miles. When carrying 283 passengers on this route, the efficiency recorded by the aircraft approaches 64.2 miles/gallon per passenger. What is the minimum quantity of fuel that 1.00gal = 3.78L?Manganese oxide can be reduced to elemental manganese in the presence of methane (CH4). The products of the reaction are manganese metal, CO2, and water vapor. Practice only reporting the correct significant figures in all answers! a. Write a balanced reaction for the reduction of manganese (IV) oxide with methane to elemental manganese.Using the information in the table below, calculate the heat of released from the following reaction in kJ per g of NO. ( Mw. Of NO = 30.01 g/mol). 4NH3(g) + 5O2 (g) 6H2O(g) + 4 NO(g) NH3 H2O NO Hfº (kJ/mol) - 46.1 -241.8 + 90.3