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Bond Energy Solutions Library

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153 solutions

Bond Energy

Q. Calculate the enthalpy of formation of ammonia from the following bond energy data:(N−N) bond =398 kJmol−1(H−H) bond =435 kJmol −1and (N≡N) bond =9...

Solved • Mar 30, 2021

Bond Energy

Q. Calculate the bond energy per mole for breaking all the bonds of oxygen, O2?Express your answer to three significant figures and include the approp...

Solved • Jul 2, 2020

Bond Energy

Q. Calculate the bond energy per mole for breaking all the bonds in methane, CH4.Express your answer to four significant figures and include the appro...

Solved • Jul 2, 2020

Bond Energy

Q. Part D. The answer is part C is the energy required to break six carbon-carbon bonds in benzene. Calculate the average bond enthalpy of one carbon-...

Solved • Jul 2, 2020

Bond Energy

Q. Part B. Compare the bond enthalpies of the nitrogen-nitrogen single and triple bonds. Based on this information, what is the average π-bond contrib...

Solved • Jul 2, 2020

Bond Energy

Q. Part A. Compare the bond enthalpies of the carbon-carbon single and triple bonds. Based on this information, what is the average π-bond contributio...

Solved • Jul 2, 2020

Bond Energy

Q. The dipole moment (μmu) of HBr (a polar covalent molecule) is 0.790D (debye), and its percent ionic character is 11.7 % . Estimate the bond length ...

Solved • Jul 2, 2020

Bond Energy

Q. Use the following table to rank these bonds in order of decreasing bond length.Rank from longest to shortest bond. To rank items as equivalent, ove...

Solved • Jul 2, 2020

Bond Energy

Q. Part B. The average bond energy (enthalpy) for a C=C double bond is 614 kJ / mol and that of a C−C single bond is 348 kJ / mol. Estimate the energy...

Solved • Jul 2, 2020

Bond Energy

Q. Part C. Rank the HX bonds from strongest to weakest. To rank items as equivalent, overlap them.Given the table of atomic radii and the fact that ha...

Solved • Jul 2, 2020

Bond Energy

Q. Part D. The S−S bond distances in S8 are 204 pm and the F−F bond distance in F2 is 143 pm. Use these values to estimate the S−F bond distance in S2...

Solved • Jul 1, 2020

Bond Energy

Q. Part C. Use average bond enthalpies to estimate the enthalpy ΔHrxn of the following reaction: 2SF4 (g) + O2 (g) → 2OSF4 (g) Express your answer num...

Solved • Jun 30, 2020

Bond Energy

Q. Choose the bond below that is the weakest.a. C=Sb. K-Clc. C-Id. C≡Oe. N≡N

Solved • Apr 21, 2020

Bond Energy

Q. Use bond energies to determine ΔHrxn for the reaction between ethanol and hydrogen chloride.CH3CH2OH(g) + HCl(g) → CH3CH2Cl(g) + H2O(g)a) -21 kJb) ...

Solved • Apr 20, 2020

Bond Energy

Q. Use the bond energies listed below to estimate the enthalpy of formation of ammonia, NH3(g)N≡N (946 kJ/mol), N-H (389 kJ/mol), H-H (436 kJ/mol),a) ...

Solved • Apr 20, 2020

Bond Energy

Q. Arrange the following in order of increasing bond strength of the carbon oxygen bond:Carbon monoxide < carbonate ion < carbon dioxideCarbonat...

Solved • Apr 20, 2020

Bond Energy

Q. Arrange the following bonds in order of increasing bond strength.A) C - I < C - Br < C - Cl < C - FB) C - F < C - Cl < C - Br < C...

Solved • Apr 15, 2020

Bond Energy

Q. Ethane, a minority component of natural gas, burns to form carbon dioxide and water according to this reaction:2H3C−CH3(g)+7O2(g)→4CO2(g)+6H2O(g)No...

Solved • Apr 13, 2020

Bond Energy

Q. C8H18(l)+252O2(g)→8CO2(g)+9H2O(g)Part ACalculate ΔHrxn for the combustion of octane (C8H18), a component of gasoline, by using average bond energie...

Solved • Apr 13, 2020

Bond Energy

Q. Bond enthalpy is _____A) always positive B) always negativeC) sometimes positive, sometimes negative D) always zero E) unpredictable

Solved • Mar 20, 2020

Bond Energy

Q. Estimate ΔH°rxn for the following reaction, using the chemical reactions given above and the ΔH°rxn values you calculated in part (a). Show all wor...

Solved • Dec 19, 2019

Bond Energy

Q. Estimate the enthalpy of reaction, ΔH rxn°, for each of the following reactions using the information provided. Show all work and circle your final...

Solved • Dec 19, 2019

Bond Energy

Q. Estimate the enthalpy of reaction, ΔH rxn°, for each of the following reactions using the information provided. Show all work and circle your final...

Solved • Dec 19, 2019

Bond Energy

Q. Estimate the enthalpy of reaction, ΔH rxn°, for each of the following reactions using the information provided. Show all work and circle your final...

Solved • Dec 19, 2019

Bond Energy

Q. Use the given bond enthalpies to estimate ∆H for the following reaction:CH4(g) + 2 F2(g) → CF4(g) + 2 H2(g)Bond enthalpies:C−F 450. kJ mol−1    C−H...

Solved • Nov 29, 2019

Bond Energy

Q. Place the following in order of decreasing bond length. H-F     H-I     H-Bra. H-I > H-F > H-Brb. H-I > H-Br > H-Fc. H-F > H-Br >...

Solved • Oct 11, 2019

Bond Energy

Q. Compared to a C=C double bond, a C-C single bond has _____ bond order, _____ bond length, and ______ bond energy.a. lower, longer, less b. lower, s...

Solved • Oct 11, 2019

Bond Energy

Q. Calculate the magnitude of the enthalpy change, and determine if the reaction is exothermic or endothermic for the following reaction: NH3 + 3F2 ⟶ ...

Solved • Oct 4, 2019

Bond Energy

Q. From the bond energies given below, estimate the ΔH° for the reaction:H2(g) + I2(g) → 2HI(g)Bond energies (kJ/mol):H–H = 436H–I = 297I–I = 151

Solved • Sep 18, 2019

Bond Energy

Q. Bond enthalpy is _____.a. always positiveb. always negativec. sometimes positive, sometimes negatived. always zeroe. unpredictable

Solved • Aug 2, 2019

Bond Energy

Q. The rates of many atmospheric reactions are accelerated by the absorption of light by one of the reactants. For example, consider the reaction betw...

Solved • Dec 6, 2018

Bond Energy

Q. Consider the following reaction:H2O(g) + Cl 2O(g) → 2HOCl(g)     K 298 = 0.090For Cl2O(g),       ΔG°f = 97.9 kJ/mol       ΔH°f = 80.3 kJ/mol       ...

Solved • Dec 3, 2018

Bond Energy

Q. Consider the following reaction:A2 + B2 → 2AB   ΔE = -285 kJThe bond energy for A2 is one-half the amount of the AB bond energy. The bond energy of...

Solved • Nov 27, 2018

Bond Energy

Q. Consider the following reaction:Estimate the carbon–fluorine bond energy, given that the C—C bond energy is 347 kJ/mol, the C=C bond energy is 614 ...

Solved • Nov 27, 2018

Bond Energy

Q. The major industrial source of hydrogen gas is by the following reaction:CH4(g) + H2O(g) → CO(g) + 3H 2(g)Use bond energies to predict ΔE for this ...

Solved • Nov 27, 2018

Bond Energy

Q. Use bond energies to predict ΔE for the following reaction:H2S(g) + 3F2 (g) → SF4 (g) + 2HF(g)

Solved • Nov 27, 2018

Bond Energy

Q. Acetic acid is responsible for the sour taste of vinegar. It can be manufactured using the following reaction:Use tabulated values of bond energies...

Solved • Nov 27, 2018

Bond Energy

Q. Use bond energies from the following table to predict ΔE for the isomerization of methyl isocyanide to acetonitrile:   CH3N ≡ C(g) → CH 3C ≡ N(g)

Solved • Nov 27, 2018

Bond Energy

Q. Write Lewis structures for CO32-, HCO3-, and H2CO3. When acid is added to an aqueous solution containing carbonate or bicarbonate ions, carbon diox...

Solved • Nov 26, 2018

Bond Energy

Q. Use bond energy values to estimate ΔE for the following gas phase reaction:C2H4 + H2O2 → CH2OHCH2OH

Solved • Nov 26, 2018

Bond Energy

Q. The following plot shows the potential energy of two Cl atoms as a function of the distance between them.What is the approximate bond strength for ...

Solved • Nov 12, 2018

Bond Energy

Q. The following plot shows the potential energy of two Cl atoms as a function of the distance between them.If the Cl2 molecule is compressed under hi...

Solved • Nov 12, 2018

Bond Energy

Q. Sulfur tetrafluoride (SF4) reacts slowly with O2 to form sulfur tetrafluoride monoxide (OSF4 ) according to the following unbalanced reaction: SF4(...

Solved • Nov 12, 2018

Bond Energy

Q. Formation of the H2 molecule as atomic orbitals overlap.From the graph, what is the bond length in the H2 molecule?

Solved • Nov 12, 2018

Bond Energy

Q. Hydrogen peroxide is sold commercially as an aqueous solution in brown bottles to protect it from light. Calculate the longest wavelength of light ...

Solved • Nov 12, 2018

Bond Energy

Q. The As-As bond length in elemental arsenic is 2.48 Å. The Cl-Cl bond length in Cl2 is 1.99 Å.What bond length is predicted for AsCl3, using the ato...

Solved • Nov 12, 2018

Bond Energy

Q. An important reaction for the conversion of natural gas to other useful hydrocarbons is the conversion of methane to ethane: 2 CH4(g) → C2H6(g) + H...

Solved • Nov 12, 2018

Bond Energy

Q. Using bond enthalpies in the table, estimate H for the following gas-phase reactions.Average Bond Enthalpies (kJ/mol)Single BondsC-H413N-H391O-H463...

Solved • Nov 12, 2018

Bond Energy

Q. Use bond energies to calculate ΔHrxn for the reaction: N2(g) + 3H2(g) → 2NH3(g)Average Bond EnergiesBondBond Energy(kJ/mol)N≡N946H-H436N-H389

Solved • Nov 12, 2018

Bond Energy

Q. Another potential future fuel is methanol (CH3OH). Write a balanced equation for the combustion of gaseous methanol and use bond energies to calcul...

Solved • Nov 12, 2018

Bond Energy

Q. The table below shows the average bond energies for some common bonds among carbon, hydrogen, and oxygen.BondBond energy(kJ/mol)C - C347C - H414C -...

Solved • Nov 12, 2018

Bond Energy

Q. Ethanol is a possible fuel. Use average bond energies to calculate ΔHrxn for the combustion of ethanol.CH3CH2OH(g) + 3 O2(g) → 2 CO2(g) + 3 H2O(g)

Solved • Nov 12, 2018

Bond Energy

Q. cis-2-Butene isomerizes to trans-2-butene via the following reaction .If the energy for isomerization came from light, what minimum frequency of li...

Solved • Nov 12, 2018

Bond Energy

Q. cis-2-Butene isomerizes to trans-2-butene via the following reaction:If isomerization requires breaking the π bond, what minimum energy is required...

Solved • Nov 12, 2018

Bond Energy

Q. Consider the halogenation of ethene, where X is a generic halogen: H2C=CH2(g) + X2(g) → H2CX-H2CX(g)Use bond energies to determine which halogen pr...

Solved • Nov 12, 2018

Bond Energy

Q. Use average bond energies together with the standard enthalpy of formation of C(g) (718.4 kJ/mol ) to estimate the standard enthalpy of formation o...

Solved • Nov 12, 2018

Bond Energy

Q. Compare the value you obtain using average bond energies to the actual standard enthalpy of formation of gaseous benzene, 82.9 kJ/mol. What does th...

Solved • Nov 12, 2018

Bond Energy

Q. The standard state of sulfur is solid rhombic sulfur. Use the appropriate standard heats of formation given in Appendix II in the textbook to find ...

Solved • Nov 12, 2018

Bond Energy

Q. Use the dipole moments of HF and HCl (HCl µ = 1.08 D;{ m{D}}, HF µ = 1.82 D;{ m{D}}) together with the percent ionic character of each bond (HCl 20...

Solved • Nov 12, 2018

Bond Energy

Q. Calculate the heat of atomization (the heat required to convert a molecule in the gas phase into its constituent atoms in the gas phase) of C2H3Cl,...

Solved • Nov 12, 2018

Bond Energy

Q. Ethane, a minority component of natural gas, burns to form carbon dioxide and water according to this reaction: 2 H3C-CH3(g) + 7 O2(g) → 4 CO2(g) +...

Solved • Nov 12, 2018

Bond Energy

Q. In the Chemistry and the Environment box on free radicals in Chapter 9 in the textbook, we discussed the importance of the hydroxyl radical in reac...

Solved • Nov 12, 2018

Bond Energy

Q. Hydrogenation reactions are used to add hydrogen across double bonds in hydrocarbons and other organic compounds. Use average bond energies to calc...

Solved • Nov 12, 2018

Bond Energy

Q. Consider the reaction: H2(g) + I2(s) → 2 HI (g)Use the bond enthalpies in the table to estimate ΔH for this reaction, ignoring the fact that iodine...

Solved • Oct 31, 2018

Bond Energy

Q. Consider the reaction: H2(g) + I2(s) → 2 HI(g)Without doing a calculation, predict whether your estimate ΔH using bond enthalpies is more negative ...

Solved • Oct 31, 2018

Bond Energy

Q. Which is more stable at room temperature, a Cl2 molecule or two separate Cl atoms?

Solved • Oct 31, 2018

Bond Energy

Q. What is the energy difference between the Cl2 molecule and the separated atoms?

Solved • Oct 31, 2018

Bond Energy

Q. Use the average bond enthalpies in the table to estimate H for the combustion of methanol.

Solved • Oct 31, 2018

Bond Energy

Q. First launch the video. The video will show you the Smart Figure. After watching the video, answer the related follow-up question. You can watch th...

Solved • Oct 31, 2018

Bond Energy

Q. Use bond enthalpies in the table below to estimate ΔH for each of the following reactions: H–H(g) + Br–Br(g)  →  2 H–Br(g)Average Bond Enthalpies (...

Solved • Oct 31, 2018

Bond Energy

Q. Use bond enthalpies in the table below to estimate ΔH for each of the following reactions.Average Bond Enthalpies (kJ/mol)C-H 413N-H 391O-H 463F-F ...

Solved • Oct 31, 2018

Bond Energy

Q. Use enthalpies of formation given in Appendix C to calculate ΔH for the reaction Br2(g)  →  2 Br(g), and use this value to estimate the bond enthal...

Solved • Oct 31, 2018

Bond Energy

Q. Average Bond Enthalpies (kJ/mol)C-H 413N-H 391O-H 463F-F 155C-C 348N-N 163O-O 146C=C 614N-O 201O=O 495Cl-F 253C-N 293N-F 272O-F 190Cl-Cl 242C-O 358...

Solved • Oct 31, 2018

Bond Energy

Q. The nitrogen atoms in an N2 molecule are held together by a triple bond; use enthalpies of formation in Appendix C to estimate the enthalpy of this...

Solved • Oct 31, 2018

Bond Energy

Q. Consider the reaction between hydrazine and hydrogen to produce ammonia, N2H4(g) + H2(g) → 2 NH3(g). Use enthalpies of formation and bond enthalpie...

Solved • Oct 31, 2018

Bond Energy

Q. (a) The nitrogen atoms in an N2 molecule are held together by a triple bond; use enthalpies of formation in Appendix C to estimate the enthalpy of ...

Solved • Oct 31, 2018

Bond Energy

Q. Consider the reaction: 2 H2(g) + O2(g) → 2 H2O(l). Use the bond enthalpies in the table to estimate ΔH for this reaction, ignoring the fact that wa...

Solved • Oct 31, 2018

Bond Energy

Q. Consider the reaction: 2 H2(g) + O2(g) → 2 H2O(l). Without doing a calculation, predict whether your estimate of ΔH using bond enthalpies is more n...

Solved • Oct 31, 2018

Bond Energy

Q. Use bond enthalpies in the table below to estimate ΔHrxn for each of the following reactions.Average Bond Enthalpies (kJ/mol)C-H 413N-H 391O-H 463F...

Solved • Oct 31, 2018

Bond Energy

Q. Use bond enthalpies in the table below to estimate H for each of the following reactions.Average Bond Enthalpies (kJ/mol)C-H 413N-H 391O-H 463F-F 1...

Solved • Oct 31, 2018

Bond Energy

Q. Hydrogen cyanide can be catalytically reduced with hydrogen to form methylamine. Use Lewis structures and bond energies to determine ΔH°rxn for HCN...

Solved • Oct 28, 2018

Bond Energy

Q. Hydrazine (N2H4) is used as a rocket fuel because it reacts very exothermically with oxygen to form nitrogen gas and water vapor. The heat released...

Solved • Oct 28, 2018

Bond Energy

Q. Ethanol (CH3CH2OH) is being used as a gasoline additive or alternative in many parts of the world.(d) “Greener” methods produce ethanol from corn a...

Solved • Oct 28, 2018

Bond Energy

Q. In the 1980s, there was an international agreement to destroy all stockpiles of mustard gas, ClCH2CH2SCH2CH2Cl. When this substance contacts the mo...

Solved • Oct 28, 2018

Bond Energy

Q. “Inert” xenon actually forms several compounds, especially with the highly electronegative elements oxygen and fluorine. The simple fluorides XeF2,...

Solved • Oct 28, 2018

Bond Energy

Q. Dimethyl ether (CH 3OCH3) and ethanol (CH 3CH2OH) are constitutional isomers (see the following Table).(c) Calculate ΔH°rxn for the conversion of e...

Solved • Oct 24, 2018

Bond Energy

Q. Dimethyl ether (CH 3OCH3) and ethanol (CH 3CH2OH) are constitutional isomers (see Table 3.3).(b) State which reaction is more exothermic.

Solved • Oct 24, 2018

Bond Energy

Q. Dimethyl ether (CH3OCH3) and ethanol (CH3CH2OH) are constitutional isomers (see Table 3.3).(a) Use following table to calculate ΔH°rxn for the form...

Solved • Oct 24, 2018

Bond Energy

Q. The average C—H bond energy in CH4 is 415 kJ/mol. Use following table and the following data to calculate the average C—H bond energy in ethane (C2...

Solved • Oct 24, 2018

Bond Energy

Q. There are two main types of covalent bond breakage. In homolytic breakage (as in following Table), each atom in the bond gets one of the shared ele...

Solved • Oct 24, 2018

Bond Energy

Q. The HF bond length is 92 pm, 16% shorter than the sum of the covalent radii of H (37 pm) and F (72 pm). Suggest a reason for this difference. Simil...

Solved • Oct 24, 2018

Bond Energy

Q. Gases react explosively if the heat released when the reaction begins is sufficient to cause more reaction, which leads to a rapid expansion of the...

Solved • Oct 23, 2018

Bond Energy

Q. Gases react explosively if the heat released when the reaction begins is sufficient to cause more reaction, which leads to a rapid expansion of the...

Solved • Oct 23, 2018

Bond Energy

Q. Acetylene gas (ethyne; HC≡CH) burns in an oxyacetylene torch to produce carbon dioxide and water vapor. The enthalpy of reaction for the combustion...

Solved • Oct 23, 2018

Bond Energy

Q. The energy of the C—C bond is 347 kJ/mol, and that of the Cl—Cl bond is 243 kJ/mol. Which of the following values might you expect for the C—Cl bon...

Solved • Oct 23, 2018

Bond Energy

Q. Sports trainers treat sprains and soreness with ethyl bromide. It is manufactured by reacting ethylene with hydrogen bromide:Use bond energies to f...

Solved • Oct 23, 2018

Bond Energy

Q. An important industrial route to extremely pure acetic acid is the reaction of methanol with carbon monoxide:Use bond energies to calculate the ent...

Solved • Oct 23, 2018

Bond Energy

Q. Use bond energies to calculate the enthalpy of reaction:

Solved • Oct 23, 2018

Bond Energy

Q. Use bond energies to calculate the enthalpy of reaction:

Solved • Oct 23, 2018

Bond Energy

Q. Which of the following gases would you expect to have the greater enthalpy of reaction per mole for combustion? Why?

Solved • Oct 23, 2018