CHEMISTRY:ATOMS FIRST-2 YEAR CONNECT
2nd Edition
ISBN: 9781260592320
Author: Burdge
Publisher: MCG
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Chapter 10, Problem 10.114QP
Interpretation Introduction
Interpretation:
The maximum
Concept Introduction:
Bond Enthalpy:
The measure of stability of molecule is bond enthalpy. The change in enthalpy is related in breaking a specific bond of 1 mole of gaseous molecule. In solids and liquids bond enthalpies are affected by neighboring molecules. There is possibility to predict the enthalpy of reaction using the average bond enthalpies. Energy is always needed for the breaking of
The enthalpy of reaction in gas phase is given by,
Where,
BE= Bond enthalpy and
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Students have asked these similar questions
In chemical reactions, heat is converted into chemical energy (the potential energy stored
in chemical bonds) or vice versa. Bond energy is the energy required to break one mole of
the bond in the gas phase. Since it takes energy to break a bond, bond energies are
always positive. Conversely, energy is released when bonds are formed. Thus, the
enthalpy change for a reaction can be approximated from
Part A
Calculate the bond energy per mole for breaking all the bonds in methane, CH4.
ΔΗ
Σ(ΔΗ breaking) + Σ(ΔΗ forming)
Express your answer to four significant figures and include the appropriate units.
where H represents bond energies for the breaking (positive bond energy) or forming
(negative bond energy) of a bond and Hrxn represents the overall enthalpy for the
• View Available Hint(s)
reaction.
Use the table to answer questions about bond energies.
HẢ
Bond energy
Bond
(kJ/mol )
Value
Units
AHCH, =
C-C
347
C=C
611
Submit
Сн
414
C-O
360
Part B
C=OinCO2
799
O-0
142
Calculate the bond…
(e)
The mean bond enthalpy for chlorine is +242 kJ mol·l and that for fluorine is +158 kJ mol-". The
enthalpy of formation of CIF (g) is 56 kJ mol·l
(ii)
Calculate the enthalpy of formation of,
gaseous
Chlorine Trifluoride, CIF3 (g), using the
bond enthalpy value you obtained in part (i).
(iii)
The bond enthalpy of CIF3 calculated in part (ii) is likely to be different than that determined
from experiment. Explain.
. The bond lengths of carbon-carbon, carbon-nitrogen, carbon-oxygen, and
nitrogen-nitrogen single, double, and triple bonds are listed in Table 8.4. Plot bond
enthalpy versus bond length listed in Table 8.5 for these bonds.
(a) Is this statement true: "The longer the bond, the stronger the bond"?
(b) Based on your chart, order the relative strengths of C-C, C-N, C-O, and
N-N bonds from weakest to strongest.
Chapter 10 Solutions
CHEMISTRY:ATOMS FIRST-2 YEAR CONNECT
Ch. 10.1 - Prob. 10.1.1SRCh. 10.1 - Prob. 10.1.2SRCh. 10.1 - Prob. 10.1.3SRCh. 10.2 - Calculate the overall change in internal energy,...Ch. 10.2 - Calculate the change in total internal energy for...Ch. 10.2 - Calculate the magnitude of q for a system that...Ch. 10.2 - The diagram on the left shows a system before a...Ch. 10.2 - Prob. 10.2.1SRCh. 10.2 - Prob. 10.2.2SRCh. 10.3 - Determine the work done (in joules) when a sample...
Ch. 10.3 - Calculate the work done by or on the system during...Ch. 10.3 - (a) Against what external pressure must a gas...Ch. 10.3 - The diagram on the left shows a sample of gas...Ch. 10.3 - Given the thermochemical equation for...Ch. 10.3 - Calculate the solar energy required to produce...Ch. 10.3 - Prob. 3PPBCh. 10.3 - The diagrams represent systems before and after...Ch. 10.3 - Prob. 10.3.1SRCh. 10.3 - Prob. 10.3.2SRCh. 10.4 - Prob. 10.4WECh. 10.4 - Prob. 4PPACh. 10.4 - Prob. 4PPBCh. 10.4 - A metal pellet with a mass of 100.0 g. originally...Ch. 10.4 - What would the final temperature be if the pellet...Ch. 10.4 - Prob. 5PPBCh. 10.4 - Prob. 5PPCCh. 10.4 - A Famous Amos bite-sized chocolate chip cookie...Ch. 10.4 - A serving of Grape-Nuts cereal (5.80 g) is burned...Ch. 10.4 - Prob. 6PPBCh. 10.4 - Suppose an experiment to determine the energy...Ch. 10.4 - Prob. 10.4.1SRCh. 10.4 - Prob. 10.4.2SRCh. 10.4 - Prob. 10.4.3SRCh. 10.4 - Prob. 10.4.4SRCh. 10.5 - Given the following thermochemical equations....Ch. 10.5 - Use the thermochemical equations provided in...Ch. 10.5 - Prob. 10.5.1SRCh. 10.5 - Prob. 10.5.2SRCh. 10.6 - Prob. 10.8WECh. 10.6 - Using data from Appendix 2, calculate Hrn for...Ch. 10.6 - Prob. 8PPBCh. 10.6 - The diagrams represent a system before and after a...Ch. 10.6 - Given the following information, calculate the...Ch. 10.6 - Use the following data to calculate Hf for...Ch. 10.6 - Prob. 9PPBCh. 10.6 - The diagrams represent a system before and after a...Ch. 10.6 - Prob. 10.6.1SRCh. 10.6 - Prob. 10.6.2SRCh. 10.6 - Prob. 10.6.3SRCh. 10.7 - Use bond enthalpies from Table 10.4 to estimate...Ch. 10.7 - Use bond enthalpies from fable 10.4 to estimate...Ch. 10.7 - Prob. 10PPBCh. 10.7 - Prob. 10PPCCh. 10.7 - Prob. 10.7.1SRCh. 10.7 - Prob. 10.7.2SRCh. 10.7 - Prob. 10.7.3SRCh. 10.7 - Prob. 10.7.4SRCh. 10.8 - Prob. 10.11WECh. 10.8 - Prob. 11PPACh. 10.8 - The lattice energy of MgO is 3890 kJ/mol, and the...Ch. 10.8 - Prob. 11PPCCh. 10.8 - Prob. 10.8.1SRCh. 10.8 - Prob. 10.8.2SRCh. 10 - Define these terms: system, surroundings, thermal...Ch. 10 - What is heat? How does heat differ from thermal...Ch. 10 - Prob. 10.3QPCh. 10 - Define these terms: thermochemistry, exothermic...Ch. 10 - Prob. 10.5QPCh. 10 - Describe two exothermic processes and two...Ch. 10 - Decomposition reactions are usually endothermic,...Ch. 10 - On what law is the first law of thermodynamics...Ch. 10 - Explain what is meant by a state function. Give...Ch. 10 - Prob. 10.10QPCh. 10 - Prob. 10.11QPCh. 10 - Prob. 10.12QPCh. 10 - Prob. 10.13QPCh. 10 - Prob. 10.14QPCh. 10 - Prob. 10.15QPCh. 10 - Prob. 10.16QPCh. 10 - Define these terms: enthalpy and enthalpy of...Ch. 10 - Prob. 10.18QPCh. 10 - Prob. 10.19QPCh. 10 - Prob. 10.20QPCh. 10 - Prob. 10.21QPCh. 10 - A gas expands and does PV work on the surroundings...Ch. 10 - Prob. 10.23QPCh. 10 - Prob. 10.24QPCh. 10 - Consider the reaction at a certain temperature. If...Ch. 10 - Prob. 10.26QPCh. 10 - Prob. 10.27QPCh. 10 - Prob. 10.28QPCh. 10 - Prob. 10.1VCCh. 10 - Prob. 10.2VCCh. 10 - Prob. 10.3VCCh. 10 - Prob. 10.4VCCh. 10 - Prob. 10.5VCCh. 10 - Prob. 10.6VCCh. 10 - Prob. 10.7VCCh. 10 - Referring to the process depicted in Figure 10.10,...Ch. 10 - What is the difference between specific heat and...Ch. 10 - Define calorimetry and describe two commonly used...Ch. 10 - Prob. 10.31QPCh. 10 - Prob. 10.32QPCh. 10 - A sheet of gold weighing 10.0 g and at a...Ch. 10 - Prob. 10.34QPCh. 10 - A quantity of 2.00 102 mL of 0.862 M HC1 is mixed...Ch. 10 - Prob. 10.36QPCh. 10 - Prob. 10.37QPCh. 10 - Prob. 10.38QPCh. 10 - A 25.95-g sample of methanol at 35.6C is added to...Ch. 10 - Prob. 10.40QPCh. 10 - Prob. 10.41QPCh. 10 - Prob. 10.42QPCh. 10 - Prob. 10.43QPCh. 10 - Prob. 10.44QPCh. 10 - Prob. 10.45QPCh. 10 - Prob. 10.46QPCh. 10 - Prob. 10.47QPCh. 10 - Prob. 10.48QPCh. 10 - Prob. 10.49QPCh. 10 - Prob. 10.50QPCh. 10 - What is meant by the standard-state condition?Ch. 10 - How are the standard enthalpies of an element and...Ch. 10 - What is meant by the standard enthalpy of a...Ch. 10 - Write the equation for calculating the enthalpy of...Ch. 10 - Prob. 10.55QPCh. 10 - Prob. 10.56QPCh. 10 - Prob. 10.57QPCh. 10 - Calculate the heats of combustion for the...Ch. 10 - Calculate the heats of combustion for the...Ch. 10 - Prob. 10.60QPCh. 10 - Prob. 10.61QPCh. 10 - Prob. 10.62QPCh. 10 - From the standard enthalpies of formation,...Ch. 10 - Prob. 10.64QPCh. 10 - Prob. 10.65QPCh. 10 - Prob. 10.66QPCh. 10 - Which is the more negative quantity at 25C: Hf for...Ch. 10 - Prob. 10.68QPCh. 10 - Prob. 10.69QPCh. 10 - Prob. 10.70QPCh. 10 - Prob. 10.71QPCh. 10 - Prob. 10.72QPCh. 10 - Prob. 10.73QPCh. 10 - Prob. 10.74QPCh. 10 - Prob. 10.75QPCh. 10 - Prob. 10.76QPCh. 10 - For the reaction 2C2H6(g)+7O2(g)4CO2(g)+6H2O(g)...Ch. 10 - Prob. 10.78QPCh. 10 - Prob. 10.79QPCh. 10 - Prob. 10.9VCCh. 10 - Prob. 10.10VCCh. 10 - Prob. 10.11VCCh. 10 - Prob. 10.12VCCh. 10 - Explain how the lattice energy of an ionic...Ch. 10 - Specify which compound in each of the following...Ch. 10 - Prob. 10.82QPCh. 10 - Prob. 10.83QPCh. 10 - Prob. 10.84QPCh. 10 - Prob. 10.85QPCh. 10 - Prob. 10.86QPCh. 10 - Prob. 10.87QPCh. 10 - Hydrazine (N2H4) decomposes according to the...Ch. 10 - Prob. 10.89QPCh. 10 - Prob. 10.90QPCh. 10 - Prob. 10.91QPCh. 10 - Prob. 10.92QPCh. 10 - Prob. 10.93QPCh. 10 - Prob. 10.94QPCh. 10 - You are given the following data....Ch. 10 - Prob. 10.96QPCh. 10 - Prob. 10.97QPCh. 10 - Prob. 10.98QPCh. 10 - Prob. 10.99QPCh. 10 - Compare the heat produced by the complete...Ch. 10 - The so-called hydrogen economy is based on...Ch. 10 - Prob. 10.102QPCh. 10 - Prob. 10.103QPCh. 10 - Prob. 10.104QPCh. 10 - Prob. 10.105QPCh. 10 - Prob. 10.106QPCh. 10 - Prob. 10.107QPCh. 10 - Prob. 10.108QPCh. 10 - A certain gas initially at 0.050 L undergoes...Ch. 10 - Prob. 10.110QPCh. 10 - The first step in the industrial recovery of zinc...Ch. 10 - Calculate the standard enthalpy change for the...Ch. 10 - Portable hot packs are available for skiers and...Ch. 10 - Prob. 10.114QPCh. 10 - Prob. 10.115QPCh. 10 - Prob. 10.116QPCh. 10 - Prob. 10.117QPCh. 10 - Prob. 10.118QPCh. 10 - Prob. 10.119QPCh. 10 - Prob. 10.120QPCh. 10 - Prob. 10.121QPCh. 10 - Prob. 10.122QPCh. 10 - Prob. 10.123QPCh. 10 - Prob. 10.124QPCh. 10 - Prob. 10.125QPCh. 10 - Vinyl chloride (C2H3Cl) differs from ethylene...Ch. 10 - Prob. 10.127QPCh. 10 - Prob. 10.128QPCh. 10 - Prob. 10.129QPCh. 10 - Determine the standard enthalpy of formation of...Ch. 10 - Prob. 10.131QPCh. 10 - Prob. 10.132QPCh. 10 - Prob. 10.133QPCh. 10 - Prob. 10.134QPCh. 10 - Prob. 10.135QPCh. 10 - Prob. 10.136QPCh. 10 - Both glucose and fructose arc simple sugars with...Ch. 10 - About 6.0 1013 kg of CO2 is fixed (converted to...Ch. 10 - Experiments show that it takes 1656 kJ/mol to...Ch. 10 - From a thermochemical point of view, explain why a...Ch. 10 - Prob. 10.141QPCh. 10 - Prob. 10.142QPCh. 10 - Prob. 10.143QPCh. 10 - Prob. 10.144QPCh. 10 - Prob. 10.145QPCh. 10 - Prob. 10.146QPCh. 10 - Prob. 10.147QPCh. 10 - Prob. 10.148QPCh. 10 - A drivers manual states that the stopping distance...Ch. 10 - Prob. 10.150QPCh. 10 - Prob. 10.151QPCh. 10 - Prob. 10.152QPCh. 10 - When 1.034 g of naphthalene (C10H8), is burned in...Ch. 10 - Prob. 10.154QPCh. 10 - A gas company in Massachusetts charges 27 cents...Ch. 10 - Prob. 10.156QPCh. 10 - Prob. 10.157QPCh. 10 - According to information obtained from...Ch. 10 - Using data from Appendix 2, calculate the standard...Ch. 10 - Using data from Appendix 2, calculate the standard...Ch. 10 - Prob. 10.3KSPCh. 10 - Prob. 10.4KSP
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- Bond Enthalpy When atoms of the hypothetical element X are placed together, they rapidly undergo reaction to form the X2 molecule: X(g)+X(g)X2(g) a Would you predict that this reaction is exothermic or endothermic? Explain. b Is the bond enthalpy of X2 a positive or a negative quantity? Why? c Suppose H for the reaction is 500 kJ/mol. Estimate the bond enthalpy of the X2 molecule. d Another hypothetical molecular compound, Y2(g), has a bond enthalpy of 750 kJ/mol, and the molecular compound XY(g) has a bond enthalpy of 1500 kJ/mol. Using bond enthalpy information, calculate H for the following reaction. X2(g)+Y2(g)2XY(g) e Given the following information, as well as the information previously presented, predict whether or not the hypothetical ionic compound AX is likely to form. In this compound, A forms the A+ cation, and X forms the X anion. Be sure to justify your answer. Reaction: A(g)+12X2(g)AX(s)The first ionization energy of A(g) is 400 kJ/mol. The electron affinity of X(g) is 525 kJ/mol. The lattice energy of AX(s) is 100 kJ/mol. f If you predicted that no ionic compound would form from the reaction in Part e, what minimum amount of AX(s) lattice energy might lead to compound formation?arrow_forwardUsing the bond energies provided, calculate the enthalpy of the reaction (∆Hrxn, in kJ) for the combustion of methanol shown below. CH3OH(l) +3/2 O2 (g) → CO2 (g) + 2 H2O(g)arrow_forwardWith reference to the “Chemistry Put to Work” box on explosives, (a) use bond enthalpies to estimate the enthalpy change for the explosion of 1.00 g of nitroglycerin. (b) Write a balanced equation for the decomposition of TNT. Assume that, upon explosion, TNT decomposes into N2(g), CO2(g), H2O(g), and C(s).arrow_forward
- (a) Compare the bond enthalpies (Table 8.3) of the carbon–carbon single, double, and triple bonds to deduce an averageπ -bond contribution to the enthalpy. What fraction ofa single bond does this quantity represent? (b) Make a similarcomparison of nitrogen–nitrogen bonds. What do youobserve? (c) Write Lewis structures of N2H4, N2H2, and N2,and determine the hybridization around nitrogen in eachcase. (d) Propose a reason for the large difference in yourobservations of parts (a) and (b).arrow_forwardHydrazine, N2H4, burns in oxygen as follows: N2H4 + O2 → N2 + 2H2O [The bond energies in kJ/mol are: N-H = 388; N-N 163; N≡N 944; O-H 463; O=O 496] Draw the chemical structures of the reactants and products and give the formula to calculate enthalpy change in a reaction, ΔH.arrow_forwardThe two compounds nitrogen dioxide and dinitrogen tetraoxide are introduced in Section 3.13. (a) NO2 is an odd-electron compound. Draw the best Lewis diagrams possible for it, recognizing that one atom cannot achieve an octet configuration. Use formal charges to decide whether that should be the (central) nitrogen atom or one of the oxygen atoms. (b) Draw resonance forms for N2O4 that obey the octet rule. The two N atoms are bonded in this molecule.arrow_forward
- 5. Consider the reaction between hydrazine and hydrogen to produce ammonia, N2H4(g)+H2(g)→2NH3(g)N2H4(g)+H2(g)→2NH3(g). Use enthalpies of formation and bond enthalpies to estimate the enthalpy of the nitrogen-nitrogen bond in N2H4N2H4. (Hint: In an N2H4N2H4 molecule, each NN atom has single bonds to the adjacent NN atom and two HH atoms. In an NH3NH3 molecule, the central NN atom has single bonds to three HH atoms.)arrow_forwardCalculate the enthalpy change from bond energies for each of these reactions: 1. Н-(g) + F:(g) — 2 HF(g) AH= 2. CH(g) + 20-(g) — СО2(g) + 2H-0 (g) AH= 3. CO(g) + 2H2(g) → CH;OH(I) AH= 4. 2H2(g) + Oz(g) – 2H;O(g) AH= 5. 2H2O(g) → 2H2(g) + O2(g) AH= 6. H2CCH2(g) + Cl2(g) → CIH2CCH2CI(g) AH=arrow_forwardUse the molar bond enthalpy data in the table to estimate the value of AHin for the equation CC14(g) + 2 F₂ (g) → CF₁ (g) + 2 Cl₂ (g) 2 The bonding in the molecules is shown. ΔΗ +=++· rxn = -CI F-F F-F -C-F CI-CI CI-CI Average molar bond enthalpies (Hbond) Bond Bond O-H C=N 0-0 N-H C-O N-N 0=0 N=N C=O N=N C-C F-F C=C Cl-Cl C=C Br-Br C-H H-H C-F H-F C-Cl H-Cl C-Br H-Br C-N H-S C=N S-S kJ.mol-¹ 464 142 351 502 730 347 615 811 414 439 331 276 293 615 kJ.mol-1 890 390 159 418 945 155 243 192 435 565 431 368 364 225 kJ.mol-¹arrow_forward
- Calculate the enthalpy change for the following reactions using the bond enthalpy given below. (Bond enthalpy/kJ : H−H = 436, C−H = 413, C=O = 799, O=O = 495, O−H = 463) (a) H2(g) + 1⁄2O2(g) → H2O(g) (b) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)arrow_forwardUsing average bond enthalpies (linked above), estimate the enthalpy change for the following reaction: CH4(g) + Cl₂(g)→→→→CH3CI(g) + HCI(g) kJarrow_forwardFructose, C6H1206(S), consists of 5 C-C single bonds, 7 C-O bonds, 7 C-H bonds, and 5 O-H bonds with average bond energies of 348 kJ/mol, 360 kJ/mol, 412 kJ/mol, and 463 kJ/mol respectively. The bond energy for C=O is 799 kJ/mol and O=O is 498 kJ/mol. The molar mass of fructose is 180.12 g/mol. Estimate the change in enthalpy if 2.56 g of fructose undergoes complete combustion at standard temperature and pressure.arrow_forward
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