Concept explainers
Both cyclooctatetraene and styrene have the molecular formula
The measured heats of combustion are
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- 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 heat of combustion of ethanol is 326.7 kcal/mol.The heat of combustion of 2-methylhexane, C7H16, is 1.150×103 kcal/mol. How much energy is released during the complete combustion of 452 grams of 2-methylhexane ?Assuming the same efficiency, would 452 grams of ethanol provide more, less, or the same amount of energy as 452 grams of 2-methylhexane?arrow_forward1. Write the combustion equations for (a) Complete combustion in theoretical air of 1 mol of gasoline, butane C4 H10 (b) Combustion with 21% excess air (c) Combustion with 9% CO in the product 2. Determine the (d) theoretical air-fuel ratio (e) Actual air-fuel ratioarrow_forwardWhat are the products of the combustion of cyclohexane? A) CO₂ B) hexane C) cyclopentane and methane D) CO₂, H₂O, and heat E) H₂Oarrow_forward
- An impure sample of hydrocarbon having a total mass of 50.8g undergoes combustion analysis to generate 72.6g CO2 (g) and 14.8g H2O (g). Assuming that the impurities do not contain carbon or hydrogen what percentage of the initial sample is the pure hydrocarbon?arrow_forwardStearic Acid (C18H36O2) is a typical fatty acid, a molecule with a long hydrocarbon chain and an organic acid group (COOH) at the end. It is used to make cosmetics, ointments, soaps, and candles and is found in animal tissue as part of many saturated fats. In fact, when you eat meat, chances are that you are ingesting some fats that contain stearic acid. Write a balanced equation for the complete combustion of stearic acid. Calculate its heat of combustion (ΔHf°(stearic acid) = -948 kJ/mol) Calculate the heat (q) in Joules when 1.00g of stearic acid is burned completely.arrow_forwardStearic Acid (C18H36O2) is a typical fatty acid, a molecule with a long hydrocarbon chain and an organic acid group (COOH) at the end. It is used to make cosmetics, ointments, soaps, and candles and is found in animal tissue as part of many saturated fats. In fact, when you eat meat, chances are that you are ingesting some fats that contain stearic acid. Write a balanced equation for the complete combustion of stearic acid. Calculate its heat of combustion (ΔHf°(stearic acid) = -948 kJ/mol) Calculate the heat (q) in Joules when 1.00g of stearic acid is burned completely Show work please!arrow_forward
- How much heat is produced if 8.0 moles of ethane undergo complete combustion?The heat of combustion for ethane, C2H6, is 45.7 kJ/g.arrow_forwardCalculate the enthalpy of benzene from its enthalpy of combustion and the enthalpy of combustion of cyclohexanearrow_forwardWrite the combustion equations for: (a) Complete combustion in theoretical air of 1 mol of gasoline, butane C4 H10 (b) Combustion with 21% excess air (c) Combustion with 9% CO in the productarrow_forward
- The molar heat of combustion of gaseous cyclopropane is -2089 Kj/mol, that for gaseous cyclopentene is -3317 Kj/mol. Calculate the heat of combustion per CH2 group in the two cases and account for the differencearrow_forward1. Which of the following fuel has the lowest heat of combustion?a.Methaneb.Octanec.Coald.Ethanol 2. What is the process of breaking larger hydrocarbon molecules into smaller ones at low temperature through the use of catalyst in order to obtain higher quality of gasoline?a.Thermal crackingb.Catalytic crackingc.Catalytic reformingd.Catalytic combination 3. What is the most common oxidizing agent available in the atmosphere that can be used to generate fire?a.hydrogen peroxideb.oxygenc.ozoned.nitrous oxidearrow_forwardGiven that there are three possible cis-dimethylcyclohexanes, if the same amount of these compounds were each combusted in a calorimeter, which one pf the three would be expected to release the least amount of heat?arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningOrganic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning