Calculation of standard molar enthalpiesData:Standard molar enthalpy of formation of H2O (g): AƒH°1 = -241.6 kJ mol-1Standard molar enthalpy of formation of H2O2 (g): AfH°2= -140.4 kJ mol-'Standard molar enthalpies of bond dissociation:AdissH°(H2(g)) = 435.6 kJ mol-'; AdissH°(O2(g)) = 497.8 kJ mol-!Calculate:AdissH°(O-O) or D(O-O), the standard molar enthalpy of dissociation of the O-O bond in themolecule of hydrogen peroxide H2O2 of structural formula H-O-0-H. The dissociationenthalpy of the O-H bond in H2O and in H2O2 will be considered as equal.

Bond dissociation enthalpy is the enthalpy change associated with the process in which 1 mol of…

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Chemistry

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ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Use the molar bond enthalpy data in the table to estimate Average molar bond enthalpies. (Hpond) the value of AHan for the equation Bond kJ. mol-1 Bond kJ. mol-1 CCI, (g) + 2F, (8) → CF,(g) + 2 CL,(g) O-H 464 C=N 890 0-0 142 N-H 390 The bonding in the molecules is shown. С-О 351 N-N 159 O=0 502 N=N 418 C=0 730 N=N 945 C CI С-С 347 F-F 155 C=C 615 Cl-CI 243 C=C 811 Br-Br 192 С-Н 414 H-H 435 C-F 439 H-F 565 C-Cl 331 H-CI 431 C-Br 276 H-Br 368 C-N 293 H-S 364 C=N | 615 S-S 225
Using Hess’s Law, calculate for the change in enthalpy of the given reactions.
Using the given molar enthalpies of formation, determine the change in enthalpy for the combustion of 1 mole of methanol. , AH°; CH3OH (4) =- 238.6 kJ/mol AH°; CO2 (g) = - 110.5 kJ/mol AH°; H2O (g) = – 241.8 kJ/mol 3 CH3OH (e) +02 (g) → CO2 (g) + 2H2O (g)
Given the standard enthalpy changes for the following two reactions: (1) 2Ni(s) + 02(9)2NİO(s) AH° = -479.4 kJ (2) 2Hg(1) + 02(g)2H90(s) AH° = -181.6 k) what is the standard enthalpy change for the reaction: (3) Nio(s) + Hg(1)Ni(s) + Hg0(s) AH° = ? kJ
Calculate the standard enthalpy change for the reaction 2CgHial) - 1702ig) – 16COg) + 18H200- Given 2C;H1s1)+ 250;(g) 16CO:(g) + 18H;O(1) AH-11,020 kJ/mol 2Co0g) + O:g) 2CO2(g) AH° --566.0 kJ/mol Multple Choice -10.450 kimol -6.492 kimol O 15.550 kmol 10.460 kimol O 6,492 kJimel
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Use the standard of enthalpies table to determine the change in enthalpy for: C6H6 (l) + 3/2 O2 (g) --> CO2 (g) + H2O (l) (just balance this equation before you compute for enthalpy change.)
Use the molar bond enthalpy data in the table to estimate the Average molar bond enthalpies. (Hpond) value of AHxn for the equation Bond kJ • mol-1 Bond kJ • mol-1 CCL, (g) + 2 F,(g) → CF,(g) + 2 Cl, (g) O-H 464 C=N 890 0-0 142 N-H 390 The bonding in the molecules is shown. С-0 351 N-N 159 CI F O=0 502 N=N 418 F-F -CI + C=0 730 N=N 945 -F CI-CI С-С 347 F-F 155 C=C 615 Cl-Cl 243 C=C 811 Br-Br 192 С-Н 414 Н-Н 435 С-F 439 Н-F 565 C-CI 331 Н-СІ 431 С-Br 276 Н-Br 368 С-N 293 Н-S 364 C=N 615 S-S 225 kJ rxn * TOOLS x10 +
Standard Enthalpy of Formations in kJ/mol at 298.15 K ΔHof ΔHof AlCl3(s) -704.2.0 Al2O3(s) -1676 H2O(l) -285.8 H2O(g) -241.8 NH4ClO3(s) -265.2 N2O(g) 81.6 Use data above to calculate the enthalpy change for the reaction: 6Al(s) + 6NH4ClO3(s) => 2Al2O3(s) + 2AlCl3(s) + 3 N2(g) + 12H2O(g) ΔH = ?
PCI5(s) can be prepared by the reaction PCI3(1) + Cl2(g) - PCI5(s). Calculate the enthalpy change (in kJ) that accompanies the production of 100.0 g of PCI5(s) by the above reaction, given the following data. P4(s) + 6 Cl2(g) - 4 PC|3(1) AH° = -1280 kJ per mole of P4(s) %3D P4(s) + 10 Cl2(g) – 4 PCI5(s) ΔΗ AH° = -1774 kJ per mole of P4(s) +59.3 -59.3 +124 -124 -258
For the reactionN2(g) + 3 H2(g) 2 NH3(g)G° = -30.4 kJ and S° = -198.7 J/K at 311 K and 1 atm.This reaction is (reactant, product)_______ favored under standard conditions at 311 K.The standard enthalpy change for the reaction of 1.80 moles of N2(g) at this temperature would be _____kJ.
Use the given standard enthalpies of formation to calculate AH° for the following reaction (SHOW CALCULATIONS) 2 Fe304(s) + C02(g) → 3 Fe2O3(s) + CO(g) Species AH°†, kJ/mol Fe2O3 (s) -824.2 FezO4 (s) -1118.4 CO (g) CO2 (8) -110.5 -393.5

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