Part A Calculate AHxn for the following reaction: Use the following reactions and given AH values: Express your answer in kilojoules to three significant figures. ► View Available Hint(s) AHrxn= IVE ΑΣΦΑ ? kJ Al2O3(s) + 3CO(g) → 2Al(s) + 3CO2 (g) 2Al(s) + CO(g) + O₂(g) → Al2O3(s), ΔΗ = AH = O₂(g) → CO₂(g), -1675.7 kJ -282.7 kJ

Part A Calculate AHxn for the following reaction: Use the following reactions and given AH values: Express your answer in kilojoules to three significant figures. ► View Available Hint(s) AHrxn= IVE ΑΣΦΑ ? kJ Al2O3(s) + 3CO(g) → 2Al(s) + 3CO2 (g) 2Al(s) + CO(g) + O₂(g) → Al2O3(s), ΔΗ = AH = O₂(g) → CO₂(g), -1675.7 kJ -282.7 kJ

Chemistry

10th Edition

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

Section: Chapter Questions

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

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Give typed explanation not a single word hand written otherwise leave it Given the following data: 2O3(g) → 3O2(g) ΔH = –427 kJ O2(g) → 2O(g) ΔH = 495 kJ NO(g) + O3(g) → NO2(g) + O2(g) ΔH = –199 kJ Calculate ΔH for the reaction: NO(g) + O(g) → NO2(g). HOW DO WE GET THERE? Question Content Area What is ΔH for the overall desired reaction? Using the standard formation enthalpies that follow, calculate the standard enthalpy change for this reaction.Fe(s) + 2HCl(aq) FeCl2(s) + H2(g) rH° = kJ Species fH° (kJ/mol) HCl(aq) -167.2 FeCl2(s) -341.8
Given the following thermochemical equations, C2 (g) +5/2O2 (g) → 2CO2 (g) +H2O (l) ΔH = −1299.5kJ C (s) + O2 (g) → CO2 (g) ΔH = −393.5kJ H2 (g) +1/2O2 (g) → H2O (l) ΔH = −285.8kJ Calculate ΔH for the decomposition of one mole of acetylene, C2H2 (g), to its elements in their stable state at 25°C and 1 atm.
Given the enthalpies for the following reactions: 2 Fe (s) + 3/2 O₂(g) → Fe2O3 (s)Math output error AH₂ ΔΗ, CO (g) + 1/2 O₂ (g) → CO₂ (g) CO2 (g) ΔΗ = -248.7 kJ rxn rxn = 1,091.6 kJ Calculate the enthalpy change (AHrxn) for the following reaction: Fe2O3 (s) + 3 CO (g) → 2 Fe (s) + 3 CO₂ (g)
With a platinum catalyst, ammonia will burn in oxygen to give nitric oxide, NO. 4NH3 (9) + 502 (g) → 4NO(9) + 6H20(g) AH = -906 kJ What is the enthalpy change for the following reaction? NO(9) + H2O(9) → NH3 (9) + O2(g) Enthalpy change : kJ
How many kilojoules of energy are generated when in 82.8 grams of CO(g) reacts according to the following reaction? CO(g) + O2 (g) → CO2(9) Hint: balance the reaction first Answer in decimal form with 1 decimal place Compound H; (KJ/mol) Compound H;(KJ/mol) CH(9) HCl(g) H,0(g) H2O(1) H2 S(g) 89.5 H2SO,(1) 33 M9SO, (s) -75.7 -93.2 Co2(9) 394.4 -242.7 SO2 (g) NH,C(s) NO(g) NO,(g) -297 -286.7 -316.3 -21 -812.2 -1279.1 SnCl4 (1) Sn0(s) SnO2(s) NaF(s) NaOH(s) Mn0(s) :-287.1 MnO2(s) -581.6 NaCl(s) SO: (9) Zn0(s) ZnS(s) -546.1 -385.8 -520.0 -411.9 -569.9 -396.1 -427.6 -3489 NH3 (9) -47.1 -203.8 CO(g) -111.4 O2(9)
Using Hess's law, what is AHf rxn for the following reaction? NO(G) + O(g) – NO2(9) NO(g) + O3(9) – NO2(9) +O2(9) AH xn = -198.8 kJ/mol Og(9) – 3/2 02(9) AHrxn = -142.2 kJ/mol 02(9) → 20(9) AH Prxn = +498.8 kJ/mol -839.8 kJ/mol -306.0 kJ/mol 394.9 kJ/mol 157.9 kJ/mol O 442.3 kJ/mol QUESTION 8 Octane (C3H18) undergoes combustion according to the following thermochemical equation. 2C8H18() + 2502(g) – 16CO2(g) + 18H20() AH°rxn = -1.0940 x 104KJ/mol What is the standard enthalpy of formation of liquid octane? AH°{(CO2(g)) = -393.5 kJ/mol and AH°F{H2O(1)) = -285.8 kJ/mol 495 kl/mol O -250 kJ/mol -495 kJ/mol -10,940. kJ/mol -2188 kJ/mol
A scientist measures the standard enthalpy change for the following reaction to be -19.2 kJ: Ca(OH)2 (aq) + 2HCl(aq) → CaCl₂ (s) + 2H₂O(1) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of HCl(aq) is kJ/mol. Species AH (kJ/mol) CaCl₂ (8) H₂O(l) Ca(OH)2 (aq) -795.8 -285.8 -1002.8
Using the data provided below, calculate the standard enthalpy change for the following reaction: 2LIOH(s) + CO,(g) → Li,CO;(s) + H,O(g) AH,º LIOH(s) = -487.23 %3D kJ/mol AHº CO2(g) = -393.51 kJ/mol AH,º Li¿CO3(s) = -1216.04 kJ/mol AHº H2O(g) = -241.82 kJ/mol %3D - 35.4 kJ O - 89.9 kJ O- 132 kJ
Be sure to answer all parts. Consider the following balanced thermochemical equation for a reaction sometimes used for H,S production: Sg(s) + H2(g) H2S(g) 8. AHran = -20.2 kJ rxn (a) Is this an exothermic or endothermic reaction? exothermic endothermic (b) What is AH for the reverse reaction? rxn 20.2 (c) What is AH when 4.00 mol of Sg reacts? -517
When 2 moles of CO(g) react with NO(g) to form CO2(g) and N2(g) according to the following equation, 747 kJ of energy are evolved. 2CO(g) + 2NO(g)2CO2(g) + N2(g) Is this reaction endothermic or exothermic? What is the value of q? kJ
Using the following thermochemical data: 2Y(s) +6HF(g)→ 2YF3(s) + 3H2(g) AH = -1811.0 kJ/mol 2Y(s) + 6HCI(g) → 2YCI3(s) + 3H2{g) AH = -1446.2 kJ/mol calculate AH for the following reaction: YF3(s) + 3HCI(g) → YCI3(s) + 3HF(g)
The following table contains some standard enthalpies of formation, AH, at 298 K. Substance diamond graphite carbon tetrachloride carbon tetrachloride carbon tetrafluoride methane carbon monoxide carbon dioxide chlorine gas Cl₂ (g) hydrochloric acid fluorine gas hydrofluoric acid hydrogen oxygen water water hydrogen peroxide hydrogen peroxide ΔΗ (kJ/mol) 1.88 Formula C(s) C(s) 0 CCl4 (g) -106.7 CC14 (1) -139.3 CF4 (g) CH4 (g) -74.8 CO(g) -110.5 -679.9 CO₂(g) -393.5 0 HCl(g) -92.30 F2 (g) 0 HF (g) -268.61 H₂(g) 0 O2 (g) 0 H₂O(g) -241.82 H₂O(1) -285.83 H₂O2(g) -136.10 H₂O2 (1) -187.8