The following reactions all have K < 1. 1) CgHyOs" (aq) + HCOOH (aq) =HCgHy©s (aq) + HCOO" (aq) 2) HCOO° (aq) + HCN (aq) = 3) HCN (aq) + C₂H₂O4 (aq) HCOOH (aq) + CN* (aq) CN (aq) + HC₂H₂O4 (aq) Arrange the substances based on their relative acid strength. CN HCgHyOs HCOOH HCOO CgH704 HCN Clear All strongest acid intermediate acid weakest acid not a Bronsted-Lowry acid

The following reactions all have K < 1. 1) CgHyOs" (aq) + HCOOH (aq) =HCgHy©s (aq) + HCOO" (aq) 2) HCOO° (aq) + HCN (aq) = 3) HCN (aq) + C₂H₂O4 (aq) HCOOH (aq) + CN* (aq) CN (aq) + HC₂H₂O4 (aq) Arrange the substances based on their relative acid strength. CN HCgHyOs HCOOH HCOO CgH704 HCN Clear All strongest acid intermediate acid weakest acid not a Bronsted-Lowry acid

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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3. Use the following equations to determine the AH°, for one mole of HBr (g) The equation for the formation is as follows: (1) 2KBr H₂(g) (aq) + Br₂(g) + Cl₂(g) - (2) H2(g) + Cl2(g) (3) KOH(aq) + HCl(aq) (4) KOH(aq) + HBr(aq) Br2(9) (5) (6) HBr (g) - - - - 2HBr(g) 2KCl(aq) Br2(aq) + 2HCl(aq) KCl(aq) + H₂O (1) KBr(aq) + H₂O(1) HBI (aq) Br2(aq) ΔΗ, rxn ΔΗ, = rxn AHⓇ rxn AHrxn ΔΗ, rxn = AH° = rxn -96.6 kJ -329.3 kJ -57.5 kJ -57.5 kJ -4.2 kJ -84.0 kJ
Using the information shown below, calculate delta Hf for the following reaction: H2O(l) + C2H4(g) → C2H5OH (l) C2H4(g) + 3O2 → 3CO2(g) + 2H2O (l) delta Hf= -1411.1 kJ C2H5OH (l) + 3O2(g) → 2CO2(g) + 3H2O(l) delta Hf= -1367.5 kJ
1) C,H,O, (aq) + C,H;COOH (aq) =#C,H;O4 (aq) + C,H;COO" (aq) 2) C,H;COO" (aq) + C,H;OH (aq)=c,H¿COOH (aq) + C,H,0 (aq) 3) C,H5OH (aq) + C,H,O, (aq) C,H5O° (aq) + HC,H,O, (aq) Arrange the substances based on their relative acid strength. Clear All HC,H,04 C,H;OH strongest acid C,H;COOH intermediate acid weakest acid CHCOO not a Bronsted-Lowry acid C,H&O
7. 2 Cro2?(aq) + 2 H* (aq) = CrO² (aq) + H2O Yellow AH° =-14 kJ/mol Orange Consider the equilibrium given above and predict the direction that the equilibrium will shift upon the (a) Addition of HCI (aq). Give reasons for your prediction. (b) Addition of NaOH(aq). Give reasons for your prediction. (c) Addition of BaCl2(aq). Give reasons for your prediction. (d) Temperature rise. Give reasons for your prediction.
2. Write the Kc expression for the reversible reaction of CH;COOH done at equilibrium conditions. CH,COOH(aq)+H,0(1) → CH,COO'(aq)+H,O'(aq)
What is AH° for the following reaction? 2C2H2(g) + 502(g)→4CO2(g) + 2H2O(1); C2H2(g) AH°f (kJ/mol) +226.7 CO2(g) AH°f (kJ/mol) -393.5 H20(1) AH°f (kJ/mol) -285.8 O a. +2599.0 kJ O b. -452.6 kJ OC. -2599 0 kJ Od +1692.2 kJ e. -1692.2 kJ
Given the reactions, X(s) + 1/2O₂(g) XCO₂ (s) XO(s) XO(s) + CO₂(g) what is AH for this reaction? X(s) + 1/2O₂(g) + CO₂(g) AH = -763.1 kJ AH = +159.3 kJ XCO3(s)
7- Given the following data: AG --51 kJ 2H: (g) + C (s) → CHa (g) 2H2 (g) + O: (g) - 2H:0 (1) C (s) + 02 (g) → CO: (g) Calculate AG° for CH4 (g) + 202 (g)CO2 (g) + 2H;0 (). AG-474 kJ AG°--394 kJ
O webassign.net + O HWCH06 - CHEM 211F21, Fall 2021| WebAssign 6-3tab.gif 288×902 pixels Selected Standard Heats of Formation at 25°C (298 K) Formula AH? (kJ/mol) Calcium Ca(s) CaO(s) CACO3(s) Carbon -635.1 - 1206.9 C(graphite) C(diamond) CO(g) CO2(g) CH4(8) CH3OH(1) HCN(g) CS2() 1.9 -110.5 - 393.5 -74.9 -238.6 135 87.9 Chlorine 121.0 CI(g) Cl2(g) HCI(g) Hydrogen H(g) H2(g) Nitrogen N2(g) NH3(g) NO(3) Oxygen O2(8) O3(g) H20(g) H2O(1) Silver -92.3 218.0 -45.9 90.3 143 -241.8 - 285.8 Ag(s) AGCI(s) Sodium - 127.0 Na(s) Na(g) NaCI(s) Sulfur 107.8 -411.1 Sg(rhombic) Ss(monoclinic) SO-(g) SO3(8) 0.3 - 296.8 - 396.0
(iv) H₂C-CH₂ O || H 1) Na CN 2) HCI (aq) HCI/H₂O heat
Q4) a) Explain why AStusion and ASvaporization are always positive? b) Natural gas is composed of 90% methane (CH4). As a heat source, methane is burned under the stream of O2. This reaction, namely combustion reaction, is given as follows : CHa(g) + 202(g) → CO2{g) +2H2O(I) According to this reaction find out AA°reaction and AG°reaction at 298 K. S° (CO2) = 213.8 J/mol.K ; S° (H2O) = 70.0 J/mol.K ; S° (CH4) = 183.6 J/mol.K ; s° (02) = 205.2 J/mol.K; AH°re reaction = -890 kJ/mol. Assume that all reactants and products behave as an ideal gase.
Calculate the standard enthalpy of reaction, AHn, of each of the given acid-base neutralization reactions involving the strong base KOH. The standard enthalpy of formation data are provided. Compound or Ion Standard Enthalpy of Formation (kJ/mol) KOH(aq) -482.4 H,00) HCIO, (aq) KCIO, (aq) HBr(aq) -285.8 -98.4 -349.5 -121.0 KBr(aq) -372.1 NH (aq) -132.5 NH, (aq) K*(aq) -80.3 -251.2 HCIO, (aq) + KOH(aq) KCIO, (aq) + H,O(1) AHn = kJ/mol HB (aq) + KОН (aq) KBr(aq) + H,O(1) AHin = kJ/mol NH (aq) + KOH(aq) NH, (aq) + K (aq) + H, O(1)