Concept explainers
Interpretation:
The given XY bond enthalpy should be calculated.
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,
Want to see the full answer?
Check out a sample textbook solutionChapter 9 Solutions
Student Solutions Manual for Ebbing/Gammon's General Chemistry
- Using the standard enthalpy of formation data in Appendix G, calculate the bond energy of the carbon-sulfur double bond in CS2.arrow_forwardUsing the standard enthalpy of formation data in Appendix G, show how the standard enthalpy of formation of HCl(g) can be used to determine the bond energy.arrow_forwardWrite the Lewis structure for nitrosyl fluoride, FNO. Using only a periodic table, identify (a) which is the longer bond. (b) which is the stronger bond. (c) which is the more polar bond.arrow_forward
- In which of the following molecules does the sulfur have an expanded octet? For those that do, write the Lewis structure. (a) SO2 (b) SF4 (c) SO2Cl2 (d) SF6arrow_forwardWrite all resonance structures of chlorobenzene, C6H5Cl, a molecule with the same cyclic structure as benzene. In all structures, keep the CCl bond as a single bond. Which resonance structures are the most important?arrow_forwardThe table below includes the bond enthalpy (the energy required to separate the diatomic molecule into its atoms) and the bond length for each diatomic molecule. Diatomic Molecule Bond Enthalpy (kJ/mol) Bond Length (pm) Cl2 243 199 O2 498 121 N2 945 110 Identify the observed trend between bond enthalpy and number of shared electrons: as the number of electrons shared between two atoms increases, the bond enthalpy ( increases / decreases / remains unchanged ). Identify the observed trend between bond length and number of shared electrons: as the number of electrons shared between two atoms increases, the bond length ( increases / decreases / remains unchanged ).arrow_forward
- Standard enthalpy of formation of N(g) is 472 kJ/mol. From this information, estimate the bond enthalpy of N₂. 944 kJ/mol 163 kJ/mol 236 kJ/mol 326 kJ/mol 472 kJ/molarrow_forwardWrite the steps (reactions) for the Born-Haber cycle for MgCl2(s). Use the Born-Haber cycle to calculate the lattice energy of MgCl2(s). Some useful data to work with: For Mg: ΔΔHsub = 147 kJ/mol, IE1 and IE2 are 738 kJ/mol and 1450 kJ/mol, respectively. For chlorine: Bond energy = 243 kJ/mol, EA1 = -349 kJ/mol, respectively. The enthalpy of formation of magnesium chloride is -748.8 kJ/mol.arrow_forwardIn 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…arrow_forward
- The enthalpy change for the following reaction is -121 kJ. Using bond energies, estimate the C-H bond energy in CH,(g). CH,(g) + Cl½(g) →CH3CI(g) + HCl(g) kJ/molarrow_forwardChlorine and bromine are in the same group in the periodic table. The bond energy of a Cl–Cl bond is 240 kJ/mol. The bond energy of a Br–Br bond is 190 kJ/mol. Which statement best explains this difference? Bromine has more electron levels than chlorine. Bromine atoms are more likely than chlorine atoms to interact with other atoms. Chlorine atoms form a double bond, and bromine atoms form a single bond. Chlorine atoms are larger than bromine atoms.arrow_forwardA scientist studies the bond energies of different compounds containing nitrogen (N). The scientist observes that the N–N bonds in one group of compounds have a bond energy of 209 kJ/mol, while the N–N bonds in another group of compounds have a bond energy of 418 kJ/mol. In one or two sentences, postulate a reason for this difference.arrow_forward
- General Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage LearningChemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStax
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning