CHEMISTRY
2nd Edition
ISBN: 9781593995782
Author: OpenStax
Publisher: XANEDU PUBLISHING
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Textbook Question
Chapter 5, Problem 74E
Both propane and butane are used as gaseous fuels. Which compound produces more heat per gram when burned?
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Both propane and butane are used as gaseous fuels. Which compound produces more heat per gram when burned?
The addition of 9.54 kJ of heat is required to raise the temperature of 207 g of a liquid hydrocarbon from 20.5°C to 45°C. What is the specific heat capacity of this hydrocarbon?
2. The enthalpy of combustion of butanoic acid is -38.91 kJ/g. Combustion of 2.63 g of butanoic acid
causes a temperature rise of 3.23°C in a certain bomb calorimeter. What is the heat capacity of this
bomb calorimeter?
A) 5.28 kJ/°C
B) 102 kJ/°C
C) 0.218 kJ/°C
D) 331 kJ/°C
E) 31.7 kJ/°C
Chapter 5 Solutions
CHEMISTRY
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- The heat of combustion, ΔH°c , of acetone, C3H6O, is -1790.4 kJ/mol. How many kilojoules of heat are evolved in the combustion of 12.4 g of acetone?arrow_forwardBurning propane gives off 49.9 kJ of heat energy per gram. If you burn 38.2 g of propane, how much heat energy is released?arrow_forwardEthanol, 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_forward
- 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 446 grams of 2-methylhexane ??? kcalAssuming the same efficiency, would 446 grams of ethanol provide more, less, or the same amount of energy as 446 grams of 2-methylhexane?arrow_forwardEthanol, 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 446 grams of 2-methylhexane ?________ kcal Assuming the same efficiency, would 446 grams of ethanol provide more, less, or the same amount of energy as 446 grams of 2-methylhexane? _________. (more, less, or the same amount)arrow_forwardHydrocarbons, compounds containing only carbon and hydrogen, are important in fuels. The heat of combustion of cyclobutane, C4H8, is 650.3 kcal/mol. Write a balanced equation for the complete combustion of cyclobutane. How much energy is released during the complete combustion of 423 grams of cyclobutane ? kcalarrow_forward
- Vanillin is a natural constituent of vanilla that is also manufactured for use in artificial vanilla flavoring. The combustion of 1.013 g of vanillin, C3H&O3, in a bomb calorimeter that has a heat capacity of 4.90 kJ °C-1 causes the temperature to rise from 24.89°C to 30.09°C. What is the heat of combustion of vanillin in terms of kcal per gram?arrow_forwardWhat happens when Ethanol burns and what happens after it burns? What happens to the matter in chemical reactions? What happens to the energy in the chemical reaction?arrow_forwardwhat is the step by step/ brief explanation of direct combustion for converting biomass to useful energy(bioenergy)?arrow_forward
- Combustion of 1.71 g heptane (C7H16) in excess oxygen will release 75 KJ of heat. Calculate the heat of combustion of heptane.arrow_forwardThe combustion of exactly 1.000 g of benzoic acid in a bomb calorimeter releases 26.38 kJ of heat. If the combustion of 0.550 g of benzoic acid causes the temperature of the calorimeter to increase from 22.01°C to 24.27°C, calculate the heat capacity of the calorimeter. O 0.660 kJ/°C O 6.42 kJ/°C O 14.5 kJ/°C O 21.2 kJ/°C O 32.7 kJ/°Carrow_forwardIf you calculated the heat of combustion of biodiesel using a bomb calorimeter, answer the following question:Compare the heat of combustion of biodiesel with heptane. Why does heptane have a larger heat of combustion? The heat of combustion of heptane is 45 kj/g. (Hint: In answering this question, it may be helpful to compare the molecular formulas of biodiesel and heptane).arrow_forward
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