Practice ProblemATTEMPT
Calculate the standard free-energy changes for the following reactions at
Want to see the full answer?
Check out a sample textbook solutionChapter 18 Solutions
CHEMISTRY >CUSTOM<
- Using values from Appendix C of your textbook, calculate the value of AH° for each of the following reactions. (a) 2 HBr(g) H₂(g) + Br₂(9) ΔΗ° = 72.8 (b) Fe₂O3(s) + 6 HCI(g) = 2 FeCl3(s) + 3 H₂O(g) AHO = 187.46 ΔΗ° = -180.74 XkJ (c) 2 NO(g) = N₂(g) + O₂(g) ΔΗ° ; X KJ = (d) 2 HI(g) H₂(g) + I₂(g) ✓ KJ X kjarrow_forwardCalculate ΔH° in kilojoules for the following reaction, the preparation of the unstable nitrous acid, HNO2. Use the following thermochemical equations:arrow_forwardGiven the following information: Bond C-H C-S S-H S=S Bond energy (kJ/mol) 414 259 347 452 Enthalpy of sublimation of CH3SH is 32.40 kJ/mol. (a) Estimate AH° in kJ for the formation of gaseous CH3SH in the following reaction: 2 CH4 (g) + S2 (g) ---> 2 CH3SH (g) Answer: kJ (b) Estimate AH° in kJ for the decomposition of solid CH3SH. 2 CH3SH (s) ---> 2 CH4 (g) + S2 (g) Answer: kJarrow_forward
- Given the following reactions and their enthalpies: ΔΗ (k/mol) H2(g) O2(g) 2H(g) 20(g) +436 +495 1 H>(g) + 02(g) → H;O(g) -242 (a) Devise a way to calculate AH for the reaction H,O(g) 2H(g) + O(g) (b) From this, estimate the H -0 bond energy.arrow_forwardWhich has the smaller ΔHhydr in each pair of the Problem? Which ion has the lower ratio of charge to volume? Explain.(a) Br- or I- (b) Sc3+ or Ca2+ (c) Br- or K+(d) S2- or Cl- (e) Sc3+ or Al3+ (f) SO42- or ClO4-(g) Fe3+ or Fe2+ (h) Ca2+ or K+arrow_forwardDetermine Δ ngas for each of the following reactions: (a) MgCO3(s) → MgO(s) + CO2(g) mol (b) 2 H2(g) + O2(g) → 2 H2O(l) mol (c) HNO3(l) + ClF(g) → ClONO2(g) + HF(g) molarrow_forward
- Calculate So values for the following reactions by using tabulated So values from Appendix C.(a) 2 NOCl(g) Æ 2 NO(g) + Cl2(g)(b) Be(OH)2(s) BeO(s) + H2O(g)(c) HCl(g) + NaOH(aq) NaCl(s) + H2O(l)(d) 2 CH4(g) C2H6(g) + H2(g)arrow_forwardCalculate the ΔH for the reaction:CS2 (l) + 2 O2(g) CO2 (g) + 2 SO2 (g)Given:ΔHfCO2 (g) = - 393.5 kJ/mol;ΔHfSO2 = -296.8 kJ/mol;ΔHfCS2 (l) = 87.9kJ/molarrow_forwardUsing the following bond energies (in kJ/mol): BE(NºN) = 946; BE(Cl─Cl) = 243; BE(N─Cl) = 200 calculate the enthalpy change, DHrxn, for the following reaction in gaseous phase. N2(g) + 3Cl2(g) --> 2NCl3(g) (A) 475 kJ (B) 589 kJ (C) 1075 kJ (D) -1075 kJarrow_forward
- Using values from Appendix C of your textbook, calculate the value of AHO for each of the following reactions. (a) 2 C2Hg(g) + O2(g) = 2 C2H4(g) + 2 H2O(g) ΔΗ° - (b) CO(g) + H2O(g) = CO2(g) + H2(g) ΔΗ ΔΗ kJ (c) 6 C(graphite) + 6 H2O(I) = C6H1206(s) = kJ ΔΗ° = kJ (d) 2 HI(g) = H2(g) + I2(g) kJarrow_forwardEe.113.arrow_forwardCalculate the standard molar enthalpy of formation of NO(g) from the following data: (A) N₂(g)+20,-2NO(g) (B) 2NO(g)+0,-2NO,(g) AH=66.4kJ AH° -114.1kJarrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY