Given the standard enthalpies of formation for the following substances, determine the reaction enthalpy for the following reaction. 2N2H4(g) + 2NO2(g) 3N2(g) + 4H20(g) AHXN = ? kJ SubstanceAH in kJ/mol N2H4(g) NO2(9) +95.4 +33.1 H20(g) -241.8 Select one: a. -1,220 kJ O b. +257 kJ/mol C. -967 kJ/mol d. +967 kJ/mol e. +1,220 kJ age Next page

Given the standard enthalpies of formation for the following substances, determine the reaction enthalpy for the following reaction. 2N2H4(g) + 2NO2(g) 3N2(g) + 4H20(g) AHXN = ? kJ SubstanceAH in kJ/mol N2H4(g) NO2(9) +95.4 +33.1 H20(g) -241.8 Select one: a. -1,220 kJ O b. +257 kJ/mol C. -967 kJ/mol d. +967 kJ/mol e. +1,220 kJ age Next page

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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Determine the change in enthalpy for the following reaction:SnO2(s) + 2 H2(g) → Sn(s) + 2 H2O(l)∆Hac,SnO2(s) = -1381.1 kJ/molrxn ∆Hac,Sn(s) = -302.1 kJ/molrxn∆Hac,H2(g) = -435.3 kJ/molrxn ∆Hac,H2O(l) = -970.3 kJ/molrxn
2.
What is the change in enthalpy for the reaction: 2B (s) + 3H2(g) → B2H6 (g) given these thermochemical equations? B2H6 (g) + 302 (g) →B2O3 (s) + 3 H₂O (g) AH = -2032 kJ 2B (s) + 3/2 O2 (g) → B2O3 (s) AH = -1272 kJ H2(g) + 1/2 O2 (g) → H2O (g) AH -241.8 kJ -4029 kJ +518.2 kJ +34.6 kJ -3546 kJ
In the recovery of iron from iron ore, the reduction of the ore is actually accomplished by reactions involving carbon monoxide. Use the following thermochemical equations, Fe,O3(s) + 3CO(g) 2Fe(s) + 3CO,(g) AH° = - 28 kJ 3Fc,O3() + CO(g) 2Fe3O4() + CO,(g) AH = -59 kJ FezO4(s) + CO(g) 3FcO(s) + CO,(g) AH° = +38 kJ to calculate AH° for the reaction FeO() + CO(g) Fe(s) + CO2(g) AH° = i kJ
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The thermite reaction, in which powdered aluminum reacts with iron oxide, is highly exothermic. 2Al(s) +Fe2O3 (s) → Al2O3(s) + 2Fe(s) Use standard enthalpies of formation to determine AHen for the thermite reaction. AĦ? Substance Al(s) Al2O3 (s)– 1675.7 Fe(s) Fe,O3 (s) -824.2 Express the heat of the reaction in kilojoules to four significant figures. ΑΣφ AHm = kJ
Write a balanced thermochemical expression depicting the formation of 1 mol of the compound below from it's elements. Note: ΔH∘fΔHf∘ for C6H12O6 (s) = -1274.4 kJ/mol 6 CO2 (g) + 6 H2O (l) ⟶⟶ C6H12O6 (s) + 6 O2 (g) ΔH∘ΔH∘ = -1274.4 kJ
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For the reactionCO(g) + Cl2(g) COCl2(g)G° = -62.9 kJ and S° = -137.3 J/K at 331 K and 1 atm.This reaction is (reactant, product) fill in the blank 1 favored under standard conditions at 331 K.The standard enthalpy change for the reaction of 2.37 moles of CO(g) at this temperature would be kJ.
Given the standard enthalpies of formation for the following substances, determine the reaction enthalpy for the following reaction. 2N2H4(g) + 2NO2(g) 3N2(g) + 4H20(g) AHrxn = ? kJ Substance AH°, kJ/mol N2H4(g) +95.4 NO2(g) H20(g) +33.1 -241.8 Select one: a. +1,224.2 kJ b. -967.2 kJ/mol C. +967.2 kJ/mol d. +257.0 kJ/mol e. -1,224.2 kJ
Using the reaction enthalpy data shown, determine the amount of heat released in each situation: 2Ca (s) + O2 (g) ----> 2 CaO (s) ΔHrxn = -1,269.8 kJ a) if calcium reacts with 3.00 moles of O2 b) if 8.00 moles of calcium reacts with O2 c) if calcium and oxygen react to form 1.00 mole of CaO
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