Cles [References] TUTOR Predicting Enthalpy of Reaction Using Bond Energies Use the References to access important values if needed for this question. Use average bond enthalpies (linked above) to calculate the enthalpy change for the following gas-phase reaction. 2H2(g) + O2(g) →→→2H2O(g) To analyze the reaction, first draw (on paper) Lewis structures for all reactant and product molecules. AHreaction Submit kl Show Approach Show Tutor Steps Submit Answer Try Another Version 10 item attempts remaining

Cles [References] TUTOR Predicting Enthalpy of Reaction Using Bond Energies Use the References to access important values if needed for this question. Use average bond enthalpies (linked above) to calculate the enthalpy change for the following gas-phase reaction. 2H2(g) + O2(g) →→→2H2O(g) To analyze the reaction, first draw (on paper) Lewis structures for all reactant and product molecules. AHreaction Submit kl Show Approach Show Tutor Steps Submit Answer Try Another Version 10 item attempts remaining

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter10: Energy

Section: Chapter Questions

Problem 41QAP: The enthalpy change for the reaction of hydrogen gas with fluorine gas (o produce hydrogen fluoride...

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Similar questions

Calculate the enthalpy of reaction for HCN(g)H(g)+C(g)+N(g) from enthalpies of formation (see Appendix C). Given that the CH bond enthalpy is 411 kJ/mol, obtain a value for the CN bond enthalpy. Compare your result with the value given in Table 9.5.
Which statement(s) is/are true about bond enthalpy? (a) The bond energy for a triple bond between A and B is three times that of a single bond between A and B. (b) H for the breaking of a bond is always a negative number. (c) Energy is required to make a bond. (d) Bond enthalpy is defined only for bonds broken or formed in the gaseous state. (e) The presence of bonds does not influence the geometry of a molecule. However, the presence of bonds affects the value of the bond enthalpy between two atoms.
When a reaction is exothermic, is the sum of bond energies of products or of reactants greater?
Compare your answers from parts a and b of Exercise 69 of Chapter 3 with H values calculated for each reaction using standard enthalpies of formation in Appendix 4. Do enthalpy changes calculated from bond energies give a reasonable estimate of the actual values?
The standard enthalpies of formation for S(g), F(g), SF4(g), and SF6(g) are +278.8, +79.0, 775, and +1209 KJ/mol, respectively. a. Use these data to estimate the energy of an SF bond. b. Compare your calculated value to the value given in Table 3-3. What conclusions can you draw? c. Why are the Hf values for S(g) and F(g) not equal to zero, since sulfur and fluorine are elements?
A commercial process for preparing ethanol (ethyl alcohol), C2H5OH, consists of passing ethylene gas. C2H4, and steam over an acid catalyst (to speed up the reaction). The gas-phase reaction is Use bond enthalpies (Table 9.5) to estimate the enthalpy change for this reaction when 37.0 g of ethyl alcohol is produced.
Compare your answer from Exercise 72 of Chapter 3 to the H value calculated from standard enthalpies of formation in Appendix 4. Explain any discrepancies. .. 72. Acetic acid is responsible for the sour taste of vinegar. It can be manufactured using the following reaction: Use tabulated values of bond engines(Table 3-3) to estimate E for this reaction
In Exercise 89 in Chapter 3, the Lewis structures for benzene (C6H6) were drawn. Using one of the Lewis Structures, estimate Hf for C6H6(g) using bond energies and given that the standard enthalpy of formation of C(g) is 717 kJ/mol. The experimental Hf value for C6H6 (g) is 83 kJ/mol. Explain the discrepancy between the experimental value and the calculated Hf value for C6H6(g).
Enthalpy changes for the following reactions can be determined experimentally: N2(g) + 3 H2(g) 2 NH3(g) rH = 91.8 kJ/mol-rxn 4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(g) rH = 906.2 kJ/mol-rxn H2(g) + O2(g) H2O(g) rH = 241.8 kl/mol-rxn Use these values to determine the enthalpy change for the formation of NO(g) from the elements (an enthalpy change that cannot be measured directly because the reaction is reactant-favored). N2(g) + O2(g) NO(g) rH = ?
hat is the enthalpy change for a process? Is enthalpy a state function? In what experimental apparatus are enthalpy changes measured?
n Section 10.7, two characteristics of enthalpy changes for reactions are listed. What are these characteristics? Explain why these characteristics are true.
The enthalpy change for the reaction of hydrogen gas with fluorine gas (o produce hydrogen fluoride is 542 U for the equation as written: mg src=Images/HTML_99425-10-41QAP_image001.jpg alt="" align="top"/> l type='a'> What is the enthalpy change per mole of hydrogen fluoride produced? Is the reaction exothermic or endothermic as written? What would be the enthalpy change for the reverse of the given equation (that 1%, for the decomposition of HF into its constituent elements)?