Chemistry
13th Edition
ISBN: 9781259911156
Author: Raymond Chang Dr., Jason Overby Professor
Publisher: McGraw-Hill Education
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Question
Chapter 24, Problem 24.22QP
Interpretation Introduction
Interpretation:
The standard enthalpy change in kilojoules per mole for the given reaction has to be calculated.
Concept introduction:
Enthalpy change of reaction: The enthalpy change of a reaction is roughly equivalent to the amount of energy lost or gained during the reaction.
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When 13.0 g of acetylene, C2H2, undergoes complete combustion, 65.5 kJ of heat are released.
a) How much energy is released when one mole of acetylene is burned?
b) Write a balanced chemical equation for the reaction and include the heat value in the equation.
The average bond enthalpy for C-His 413 kJ/mol. 413 kJ of energy is required to break a mole of CH into atoms:
CH(g)→C(g) + H(g), AH=413 kJ
Using this information, and your answer from Part A, calculate the enthalpy change of the reaction from Part B. That is, calculate the energy required to break only the
carbon-carbon bonds in benzene.
Express your answer to four significant figures and include the appropriate units.
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Calculate the enthalpy of benzene from its enthalpy of combustion and the enthalpy of combustion of cyclohexane
Chapter 24 Solutions
Chemistry
Ch. 24.2 - How many structural isomers are there in the...Ch. 24.2 - Prob. 2PECh. 24.2 - Prob. 3PECh. 24.2 - Prob. 4PECh. 24.2 - Prob. 1RCFCh. 24.2 - For which of the following compounds are cis-trans...Ch. 24.3 - Prob. 1RCFCh. 24.4 - Prob. 5PECh. 24.4 - Prob. 1RCFCh. 24 - Prob. 24.1QP
Ch. 24 - Prob. 24.2QPCh. 24 - What do saturated and unsaturated mean when...Ch. 24 - Prob. 24.4QPCh. 24 - Prob. 24.5QPCh. 24 - Why is it that alkanes and alkynes, unlike...Ch. 24 - Prob. 24.7QPCh. 24 - Prob. 24.8QPCh. 24 - Prob. 24.9QPCh. 24 - Give examples of a chiral substituted alkane and...Ch. 24 - Draw all possible structural isomers for the...Ch. 24 - Prob. 24.12QPCh. 24 - Draw all possible isomers for the molecule C4H8.Ch. 24 - Draw all possible isomers for the molecule C3H5Br.Ch. 24 - Prob. 24.15QPCh. 24 - Prob. 24.16QPCh. 24 - Draw the structures of cis-2-butene and...Ch. 24 - Prob. 24.18QPCh. 24 - Prob. 24.19QPCh. 24 - Prob. 24.20QPCh. 24 - Prob. 24.21QPCh. 24 - Prob. 24.22QPCh. 24 - Prob. 24.23QPCh. 24 - Prob. 24.24QPCh. 24 - Which of the following amino acids are chiral: (a)...Ch. 24 - Name the following compounds: (a) CH3CCCH2CH3Ch. 24 - Prob. 24.27QPCh. 24 - Prob. 24.28QPCh. 24 - Prob. 24.29QPCh. 24 - Prob. 24.30QPCh. 24 - Prob. 24.31QPCh. 24 - Name the following compounds:Ch. 24 - Prob. 24.33QPCh. 24 - Prob. 24.34QPCh. 24 - Prob. 24.35QPCh. 24 - Prob. 24.36QPCh. 24 - Prob. 24.37QPCh. 24 - Prob. 24.38QPCh. 24 - Prob. 24.39QPCh. 24 - Prob. 24.40QPCh. 24 - Predict the product or products of each of the...Ch. 24 - Prob. 24.42QPCh. 24 - Prob. 24.43QPCh. 24 - Given these data...Ch. 24 - Prob. 24.45QPCh. 24 - Prob. 24.46QPCh. 24 - Prob. 24.47QPCh. 24 - Prob. 24.48QPCh. 24 - How many liters of air (78 percent N2, 22 percent...Ch. 24 - Prob. 24.50QPCh. 24 - Prob. 24.51QPCh. 24 - Prob. 24.52QPCh. 24 - Prob. 24.53QPCh. 24 - The combustion of 3.795 mg of liquid B, which...Ch. 24 - Prob. 24.55QPCh. 24 - Indicate the asymmetric carbon atoms in the...Ch. 24 - Prob. 24.57QPCh. 24 - Prob. 24.58QPCh. 24 - Prob. 24.59QPCh. 24 - Name the classes to which the following compounds...Ch. 24 - Prob. 24.61QPCh. 24 - Prob. 24.62QPCh. 24 - Prob. 24.63QPCh. 24 - Prob. 24.64QPCh. 24 - Prob. 24.65QPCh. 24 - Prob. 24.66QPCh. 24 - Prob. 24.67QPCh. 24 - When a mixture of methane and bromine vapor is...Ch. 24 - Prob. 24.69QPCh. 24 - Prob. 24.70QPCh. 24 - Prob. 24.71QPCh. 24 - Prob. 24.72QPCh. 24 - Prob. 24.73QPCh. 24 - Prob. 24.74QP
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Similar questions
- Alcohols A, B and C all have the composition C4H 100. Molecules of alcohol A contain a branched carbon chain and can be oxidized to an aldehyde; molecules of alcohol B contain a linear carbon chain and can be oxidized to a ketone; and molecules of alcohol C can be oxidized to neither an aldehyde nor a ketone. Write the Lewis structures of these molecules.arrow_forwardConsider the compound 2,4-dimethyl-3-isopropylpentane. How many unique radical structures can be derived from this hydrocarbon when it undergoes free radical substitution? Write the number of free radicals formed.arrow_forwardThe heat of combustion of 2-methylheptane, C8H18, is 5464 kJ/mol. How much energy is released during the complete combustion of 399 grams of 2-methylheptane ? a) 19,100 kJ b) 21,800 kJ c) 16,200 kJ d) 20,100 kJarrow_forward
- Draw the enthalpy diagram for the formation of octane.arrow_forwardGive the molecular formula of a hydrocarbon containing five carbon atoms that is an alkane.arrow_forwardPropane, C3H8, is a hydrocarbon that is commonly used as a fuel.(a) Write a balanced equation for the complete combustion of propane gas.(b) Calculate the volume of air at 25 °C and 1.00 atmosphere that is needed to completely combust 25.0 grams of propane. Assume that air is 21.0 percent O2 by volume. (Hint:use the information that 1.00 L of air at 25 °C and 1.00 atm contains 0.275 g of O2 per liter.)(c) The heat of combustion of propane is −2,219.2 kJ/mol. Calculate the heat of formation, ΔH°f of propane given that ΔH°f of H2O(l) = −285.8 kJ/mol and ΔH°f of CO2(g) = −393.5 kJ/mol. (d) Assuming that all of the heat released in burning 25.0 grams of propane is transferred to 4.00 kilograms of water, calculate the increase in temperature of the water.arrow_forward
- A student added bromine solution to a hydrocarbon sample that contained an isomer of C6H12 (E) in the absence of light. After shaking the sample, the student noticed that the colour of the bromine solution changed from orange to colourless. Use the following information to answer the question 6. An interpretation that could be made from the student's observations is that the hydrocarbon sample isi and the IUPAC name of the sample could be ii . The statement above is completed by the information in row: i saturated saturated unsaturated unsaturated Row A B C D wer (2 marks) ii hex-2-ene cyclopentane hex-2-ene cyclopentane 0arrow_forwardThe combustion of isoctane reaction produces -5099.5 kJ of heat per mole of C8H18 (g) consumed, under standard conditions. The enthalpy of formation (DHf) for CO2(g) and H2O (g) are -393.5 kJ/mol and -241.8 kJ/mol, respectively. Find the standard enthalpy of formation (DHf) of this isomer of C8H18 (g)? (Show work) C8H18 (g) + O2(g) -> 8CO2(g) + 9H2O(g) DHrxn = -5099.5 kJarrow_forwardGasohol is a mixture of 90% gasoline and 10% ethanol, CH 3CH 2OH. Ethanol is considered an environmentally friendly fuel additive because it can be made from a renewable source—sugarcane. Ethanol burns in air to form CO 2 and H 2O, and, like the combustion of alkanes, this reaction also releases a great deal of energy. Write a balanced equation for the combustion of ethanol.arrow_forward
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