Name Hachel UWest Section 1. Write a balanced equation for the formation of CO this reaction using the following data (at 25 °C): from C and 0, Calculate the enthalpy change for 2(g) C+ ½ 02(0) CO (g) AH = - 111 kJ (s) 2 O219) (g) CO O, + ½ U21g) CO, AH = - 394 kJ 2 (g) Is this reaction endothermic or exothermic? a) Explain how AT would be affected if a greater amount of surrounding solvent (water) is used, assuming the mass of salt remains constant? would be affected if a greater amount of surrounding solvent (water) is used? b) Explain how Explain. Ireaction ies are known:

Name Hachel UWest Section 1. Write a balanced equation for the formation of CO this reaction using the following data (at 25 °C): from C and 0, Calculate the enthalpy change for 2(g) C+ ½ 02(0) CO (g) AH = - 111 kJ (s) 2 O219) (g) CO O, + ½ U21g) CO, AH = - 394 kJ 2 (g) Is this reaction endothermic or exothermic? a) Explain how AT would be affected if a greater amount of surrounding solvent (water) is used, assuming the mass of salt remains constant? would be affected if a greater amount of surrounding solvent (water) is used? b) Explain how Explain. Ireaction ies are known:

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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[References] The reusable booster rockets of the space shuttle use a mixture of aluminum and ammonium perchlorate as fuel. A possible reaction is 3A1(s) +3NH,CIo,(s) → Al,0,(s) + AlCls (s) + 3NO(g) + 6H2O(g) Calculate AH for this reaction. Substance and State AH; (kJ/mol) Al(s) Al2O3 (s) AICI3 (s) H20(g) NO(g) NH CIO.(s) -1676 -704 -242 90. -295 AH: kJ Submit Answer Try Another Version 1 item attempt remaining Prev
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() + 3CO(g). 2Fe(s) + 3CO,(g) AH° =-28 kJ 3Fe,O3(6) + CO(g) 2Fe,O4() + CO,(g) AH° = -59 kJ FezO,(s) + CO(g)- 3FcO(s) + CO,(g) AH° = +38 kJ The AH;° for the reaction FeO(s) + CO(g)- Fe(s)+ CO2(g) is -16.8 kJ. Use this data and the data in the following table to calculate the value of AH;° for FeO. Standard Enthalpies of Formation of Typical Substances Substance H,O,() HBr(g) AH? (NI mol-") AH7 (kI mol-1) AH; (KI mol-") AH (KI mol-1) Substance substance substance Ag(s) -187.6 CH() -84.667 NO(g) 90.37 AgBr() - 100.4 -36 CH,OH) -277.63 NO:(g) 33.8 - 127.0 HCI(g) -92.30 Ca(s) N,0(g) 81.57 AlG) HI(g) 26.6 CaBrzG) -682.8 9.67 Al,O,() -1669.8 HNO,() -173.2 CaCO,(s) -1207 N,O,(g) 11 C6) (graphite) H,SO) -811.32 CaCl,() -795.0 Na(s) HC,H,0,() NaHCO,() Na,CO,() NaCI() -110.5 -487.0 -635.5 -947.7 CO,() CH(g) CH,C(g) CHI(g)…
6 8 7. Consider the following reaction: 2 CH;OH (g) → 2 CH4() O2 (g), AH = + 252.8 kJ a) Is this reaction exothermic or endothermic? b) Calculate the amount of heat transferred when 26.0 g of CH3OH(g) is decomposed by this reaction at constant pressure. Express the heat to three significant digits with the appropriate units. c) For a given sample of CH;OH, the enthalpy change during the reaction is 82.9 kJ. What mass of methane gas is produced? Express the mass to three significant digits with the appropriate units. d) How many kilojoules of heat are released when 38.8 g CH4(g) reacts completely with 02(g) to form CH,OH(g) at constant pressure?
Using the equations Ca(s) + 1/2 0, (g) → CaO (s) AH° = -450 kJ/mol CO, (g) → C (s) + O, (g) AH° = 394 kJ/mol Determine the enthalpy for the reaction C(s) + 2 CaO(s) → CO, (g) + 2 Ca(s). KJ/mol 1 2 3 6. C 7 8 9. +/- х 100 4.
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
4) Consider the thermochemical equation below. What mass of HgO must decompose to consume 400.0 kJ of heat? 2 HgO (s) → 2 Hg (1)+ O2(g) AH°rxn =+ 181.4 kJ (1) 5) Write the standard formation reaction for KAI(SO4)2(s). (1) 3 CO2 (g). (1) -393.5 kJ/mol 2 Cr (s) + 3 CO (ag) -110.5 kJ/mol Cr2O3 (s) 6) Consider the reaction 0.0 kJ/mol AH°f = -1139.7 kJ/mol Calculate AH°rxn.
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.
A chemist measures the enthalpy change AH during the following reaction: 4 Fe(s) + 3 02(g)→2 Fe,O3(s) AH =-320. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ x10 Fe(s) + 0,6) - Fe,0,(1) O kJ 2Fe,0; (s) – 4Fe(s) + 30, (3) O kJ 4Fe,0, (s) - 8Fe(s) + 60, (3)
27. When 0.0500 mol of CH4 (g) burns, 40.1 kJ of heat is produced. What is the change in enthalpy (AH) in kJ for the following reaction: CH4 (g) (a) +802 kJ/mol + 202 (g) (b) -802 kJ/mol , CO₂ (g) + 2H₂O(g) + Heat (c) +40.1 kJ/mol (d) -40.1 kJ/mol
Gasoline is composed primarily of hydrocarbons, includingmany with eight carbon atoms, called octanes. One ofthe cleanest–burning octanes is a compound called 2,3,4-trimethylpentane, which has the following structural formula: The complete combustion of one mole of this compoundto CO21g2 and H2O1g2 leads to ΔH° = -5064.9 kJ.(a) Write a balanced equation for the combustion of1 mol of C8H181l2. (b) By using the information inthis problem and data in Table 5.3, calculate ΔHf° for2,3,4-trimethylpentane.
Given the standard enthalpy changes for the following two reactions: (1) Sn(s) + Cl½(g)–SnCl½(s) AH° = -325.1 kJ (2) Sn(s) + 2C12(g)– →SNCI4(1) AH° = -511.3 kJ what is the standard enthalpy change for the reaction: (3) SNC1,(s) + Cl2(g)SnCl4(1) AH° = ? kJ
The reusable booster rockets of the space shuttle use a mixture of aluminum and ammonium perchlorate as fuel. A possible reaction is 3A1(s) + 3NH, Cl0,(8) → Al, O, (s) + AICI; (s) + 3NO(9) + 6H2O(g) Calculate AH° for this reaction. Substance and State AH ° (kJ/mol) Al(s) Al2 O3 (s) AICI3 (s) H2O(g) NO(g) NH, CIO4 (s) -1676 -704 -242 90. -295 AH° = kJ