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- Given the following reaction: 2C₂H2(g) + 502(g) → 4CO₂(g) + 2H₂O(g) AH = -2511.6 kJ What is the energy change when 3.26 g of C₂H2 react with excess O₂?What is the heat of combustion of ethane, C₂H, in kilojoules per mole of ethane? Enthalpy of formation values can be found in this list of thermodynamic properties. AH = kJ/mol ethaneThe salt magnesium chloride is soluble in water. When 0.530 g of MgCl, is dissolved in 106.00 g of water, the temperature of the solution increases from 25.00 to 26.94 °C. Based on this observation, calculate the enthalpy of dissolution of MgCl, (in kJ/mol). 6. Assume that the specific heat of the solution is 4.184 J/g °C and that the heat absorbed by the calorimeter is negligible. AH dissolution kJ/mol
- Given the following reactions Fe2O3 (s) + 3CO (s) → 2Fe (s) + 3CO2 (g) ΔH = -26.6 kJ 3Fe (s) + 4CO2 (s) → 4CO (g) + Fe3O4 (s) ΔH = +10.2 kJ the enthalpy of the reaction of Fe2O3 with CO 3Fe2O3 (s) + CO (g) → CO2 (g) + 2Fe3O4 (s) is __________ kJ.It is interesting to compare the “fuel value” of a hydrocarbonin a hypothetical world where oxygen is not thecombustion agent. The enthalpy of formation of CF41g2 is-679.9 kJ>mol. Which of the following two reactions is themore exothermic?CH41g2 + 2 O21g2 ¡ CO21g2 + 2 H2O1g2CH41g2 + 4 F21g2 ¡ CF41g2 + 4 HF1g2Using the following equation for the combustion of postane, calculate the heat associated with the formation of 100.0 g of phosphorous dioxide. The molar mass of postane is 263.6 g/mole. The molar mass of phosphorous dioxide is 62.9 g/mole. 2 P8H18 + 25 O2 → 16 PO2 + 18 H2O ΔH°rxn = -12018 kJ
- Brazilians are quite familiar with fueling their automobiles with ethanol, a fermentation product from sugarcane.C2H5OH(l)+3O2(g)2CO2(g)+3H2O(g)Given the following reactions Fe2O3 (s) + 3CO (s) → 2Fe (s) + 3CO2 (g) ΔH = -28.0 kJ 3Fe (s) + 4CO2 (s) → 4CO (g) + Fe3O4 (s) ΔH = +12.5 kJ the enthalpy of the reaction of Fe2O3 with CO 3Fe2O3 (s) + CO (g) → CO2 (g) + 2 Fe3O4 (s) is ________ kJ. please help explainGiven the following reactions: Fe2O3(s) + 3 CO(g)→2 Fe(s) + 3 CO2(g); ΔH = −28.0kJ 3 Fe(s)+ 4 CO2(g) →4 CO(g) + Fe3O4(s); ΔH = +12.5 kJ the enthalpy of the reaction of Fe2O3 with CO 3 Fe2O3(s) + CO(g) → CO2(g) + 2 Fe3O4(s) is which of the following? -109 kJ -15.5 kJ +109 kJ -59.0 kJ
- Ethanol, C₂H6O, is most often blended with gasoline - usually as a 10 percent mix - to create a fuel called gasohol. Ethanol is a renewable resource and ethanol-blended fuels, like gasohol, appear to burn more efficiently in combustion engines. The combustion of one mole of ethanol releases 326.7 kcal of energy. The combustion of one mole of 2-methylhexane, C7H16, releases 1.150 × 10³ kcal of energy. How much energy is released during the complete combustion of 450. grams of 2-methylhexane? kcal Assuming the same efficiency, would 450. grams of ethanol provide more, less, or the same amount of energy as 450. grams of 2- methylhexane?Use the chemical equation below to complete the conversion factor: 6H₂O (1) + 6CO2 (g) → C6H12O6 (s) + 602 (9) 7 mol C HO ? kJ heat mol C6H12O6 kJ heat of reaction = +2803 kJDuring the combustion of 5.00 gg of octane, C8H18C8H18, 239.5 kcalkcal (1002 kJkJ) is released. what is the balanced equation for the combustion reaction? How much energy (in kJkJ) is released by the combustion of 1.21 molmol of C8H18C8H18 ? How many moles of octane must be burned to release 442.4 kcalkcal ? How many kilocalories are released by the combustion of 18.3 gg of C8H18C8H18 ?