(a)
To determine: The standard enthalpy change, and entropy change for the given reaction.
Solution: The standard enthalpy change for the given reaction is − 196.6 kJ and the standard entropy change for the reaction is 189.6 J/K .
Explanation:
Given
The balanced chemical reaction is,
2 SO 2 ( g ) + O 2 ( g ) → 2 SO 3 ( g )
The standard entropy change of the reaction is calculated by the formula,
Δ H 0 = ∑ n Δ H 0 ( products ) − ∑ m Δ H 0 ( reactants ) = 2 Δ H SO 3 ( g ) 0 − ( 2 Δ H SO 2 ( g ) 0 + Δ H O 2 ( g ) 0 )
Substitute the standard values of Δ H SO 2 ( g ) 0 , Δ H O 2 ( g ) 0 and Δ H SO 3 ( g ) 0 from appendix C in above equation.
Δ H 0 = 2 × ( − 395.2 kJ/mol ) − ( 2 mol × ( − 296.9 kJ/mol ) + 1 mol × 0.0 kJ/mol ) = − 196.6 kJ
Thus, the standard enthalpy change for the given reaction is − 196.6 kJ .
Now, calculate the standard entropy change for the given reaction.
The balanced chemical reaction is,
2 SO 2 ( g ) + O 2 ( g ) → 2 SO 3 ( g )
The standard entropy change of the reaction is calculated by the formula,
Δ S 0 = ∑ n Δ S 0 ( products ) − ∑ m Δ S 0 ( reactants ) = 2 Δ S SO 3 ( g ) 0 − ( 2 Δ S SO 2 ( g ) 0 + Δ S O 2 ( g ) 0 )
Substitute the standard values of Δ S SO 2 ( g ) 0 , Δ S O 2 ( g ) 0 and Δ S SO 3 ( g ) 0 from appendix C in the above equation.
Δ S 0 = 2 × 256.2 J/mol ⋅ K − ( 2 mol × 248.5 J/mol ⋅ K + 1 mol × 205.0 J/mol ⋅ K ) = − 189.6 J/K
Thus, the standard entropy change for the given reaction is − 189.6 J/K .
Conclusion:
The standard enthalpy change for the given reaction is − 196.6 kJ and the standard entropy change for the reaction is 189.6 J/K .
To determine: The standard enthalpy change, and entropy change for the given reaction.
Solution: The standard enthalpy change for the given reaction is
Explanation:
Given
The balanced
The standard entropy change of the reaction is calculated by the formula,
Substitute the standard values of
Thus, the standard enthalpy change for the given reaction is
Now, calculate the standard entropy change for the given reaction.
The balanced chemical reaction is,
The standard entropy change of the reaction is calculated by the formula,
Substitute the standard values of
Thus, the standard entropy change for the given reaction is
Conclusion:
The standard enthalpy change for the given reaction is
(b)
To determine: The standard free energy change for the given reaction.

Want to see the full answer?
Check out a sample textbook solution
Chapter 19 Solutions
MAST F/ CHEM: THE CENTRAL SCI CODE ALON
- 5. Drawn the structure of the compound (molecular formula C12H16) with the longest λmax in its UV-vis spectrum.arrow_forwardUse solubility rules to complete balance molecular equations, and provide total and net ionic equations.arrow_forwardUse solubility rules to provide balance molecular equation, total, and net ionic equationarrow_forward
- Use solubility rules to provide balance molecular equation, total, and net ionic equationarrow_forwardBr HO ? HO ✓ OHarrow_forwardUse the literature Ka value of the acetic acid, and the data below to answer these questions. Note: You will not use the experimental titration graphs to answer the questions that follow. Group #1: Buffer pH = 4.35 Group #2: Buffer pH = 4.70 Group #3: Buffer pH = 5.00 Group #4: Buffer pH = 5.30 Use the Henderson-Hasselbalch equation, the buffer pH provided and the literature pKa value of acetic acid to perform the following: a) calculate the ratios of [acetate]/[acetic acid] for each of the 4 groups buffer solutions above. b) using the calculated ratios, which group solution will provide the best optimal buffer (Hint: what [acetate]/[acetic acid] ratio value is expected for an optimal buffer?) c) explain your choicearrow_forward
- How would you prepare 1 liter of a 50 mM Phosphate buffer at pH 7.5 beginning with K3PO4 and 1 M HCl or 1 M NaOH? Please help and show calculations. Thank youarrow_forwardDraw the four most importantcontributing structures of the cation intermediate thatforms in the electrophilic chlorination of phenol,(C6H5OH) to form p-chlorophenol. Put a circle aroundthe best one. Can you please each step and also how you would approach a similar problem. Thank you!arrow_forwardA 100mM lactic acid/lactate buffer was found to have a lactate to lactic acid ratio of 2 and a pH of 4.2. What is the pKa of lactic acid? Can you please help show the calculations?arrow_forward
- Using line angle formulas, draw thestructures of and name four alkanes that have total of 7carbons, one of which is tertiary.Please explain this in detail and can you also explain how to approach a similar problem like this as well?arrow_forwardUsing dashed line wedge projections drawthe indicated compounds and indicate whether thecompound you have drawn is R or S.(a) The two enantiomers of 2-chlorobutane. Can you please explain your steps and how you would approach a similar problem. Thank you!arrow_forward5) There are no lone pairs shown in the structure below. Please add in all lone pairs and then give the hybridization scheme for the compound. (8) 10,11 7) 1.2.3 H 4 | 14 8) COC 12 13 H 16 15 H7 9) - 5.6 C 8 H 10) H 1). 2) 3)_ 11) 12) 13) 4)_ 14) 5) 15) 16) 6)arrow_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





