Standard Entropy of ReactionMolecular systems tend to move spontaneously to a state of maximumrandomness or disorder. Molecular randomness, or disorder, is calledentropy and is denoted by the symbol S. As a state function, entropychange, A.S. depends only on initial and final states. AS has a positivevalue when disorder increases and a negative value when disorderdecreases. The following conditions usually result in an increase inentropy:• a change of phase: solid-liquid-gas,an increase in the number of gas molecules, or•a solid dissolving to form a solution.Although the sign of the entropy change can be predicted as describedabove, the actual value of AS° must be calculated from the absoluteentropy values. Sº, of the reactants and products:ASS° (products) - S° (reactants)▼Part APredict the sign of the entropy change. AS°, for each of the reaction displayed.Drag the appropriate items to their respective bins.▸ View Available Hint(s)PositiveSubmitH₂O(1) H₂O(g)CH12(g) + 802(g) →5CO2(g) + 6H₂O(g)P4(g) +502(g) →→→P4O10(s)2KCIO3(s) 2KCl(s) + 30₂(g)Ag+ (aq) + Cl(aq) →>AgCl(s)Reset HelpNegative2NH₂(g) N2(g) + 3H₂(g)Review | Constant Part BCalculate the standard entropy change for the reactionusing the data from the following table:AS" =SubmitValueUnitsP4(g) +502(g) →P4010(S)Substance AHP (kJ/mol) AG (kJ/mol) So [J/(K-mol)]P4(g)279.9O₂(g)205.0P4010(s)228.9Express your answer to four significant figures and include the appropriate units.▸ View Available Hint(s)[www] ?58.900.00-298424.500.00-2698

We know entropy increases in the order- Solid<Liquid<Gas. so using this concept we can solve…

Predict the sign of the entropy change. AS, for each of the reaction displayed. Drag the appropriate items to their respective bins. ▸ View Available Hint(s) Positive Submit C₂H12(g) + 80₂(g) → 5CO,(g) + 6H,O(8) 2KCIO₂ (s) >2KC1(s) + 30₂(g) P4(g) +502(g) P4O₁0(s) Ag+ (aq) + Cl (aq) AgCl(s) [2NH₂(g) N₂(g) + 3H₂(g) H₂O(1) >H₂O(g) Reset Help Negative

Predict the sign of the entropy change. AS, for each of the reaction displayed. Drag the appropriate items to their respective bins. ▸ View Available Hint(s) Positive Submit C₂H12(g) + 80₂(g) → 5CO,(g) + 6H,O(8) 2KCIO₂ (s) >2KC1(s) + 30₂(g) P4(g) +502(g) P4O₁0(s) Ag+ (aq) + Cl (aq) AgCl(s) [2NH₂(g) N₂(g) + 3H₂(g) H₂O(1) >H₂O(g) Reset Help Negative

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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Enter your answer in the provided box. Calculate the standard entropy change for the following reaction at 25°C. 2 Al(s) + 3 ZnO(s) → Al₂O3(s) + 3 Zn(s) Substance Al(s) Al³+ (aq) Al₂O3(s) Zn(s) Zn²+ (aq) ZnO(s) J/K Sº (J/K mol) 28.3 -313.38 50.99 41.6 -106.48 43.9 27
What is the temperature at which the reaction below becomes spontaneous, if the standard entropies of reactants and products at 25oC are So (C(gr)) = 5.74 J/mol*K, So(H2(g)) = 130.68 J/mol*K, and So (C8H8(g)) = 345.2600J/mol*K and the heat of formation of C8H8(g)) is 147.8500 kJ/mol?C8H8(g) ↔ 8C(gr) + 4H2(g)a)661.88 Kb)707.958 Kc)the reaction is never spontaneousd)the reaction is always spontaneous
2 For the synthesis of ammonia where AG = -33.3 kJ/mole, determine whether the reaction is spontaneous at 25 C with the following pressures: PN, = 1.0 atm, PH, = 3.0 atm, PNH, = 0.020 atm N2(8) + 3H2(g) = 2NH3(g)
Predict whether AS for each reaction would be greater than zero, less than zero, or too close to zero to decide. I2 (g) + Cl₂ (g) → 2IC1(g) PC15 (9)→→ PC13 (9) + Cl₂ (9) CH₁ (g) +202(g) → CO₂ (g) + 2H₂O(g) 2CO2(g) +5H2(g) → C₂H₂ (g) + 4H₂O(g) CaCO3(s)→ CaO(s)+CO,(g) Clear All AS > 0 AS < 0 too close to decide
Consider the following reaction: C(graphite) + 1/2 O2 (g) → CO(g) Is it spontaneous under standard conditions at 298 K? Answer this question by calculating AS" (system), AS° (surroundings), and AS (universe). (Define reactants and products as the system.) S* (J/mol · K) A¡H° (kJ/mol) at 298 K (kJ/mol) Compound at 298 K C(s, graphite) 5.6 CO(g) 197.674 -110.525 CS2 (g) 237.8 116.7 CCL (e) 214.39 -128.4 Cl2 (g) 223.08 Si(s) 18.82 SİCL, (g) 330.86 -662.75 S(s, rhombic) 32.1 Br2 (e) 152.2 HBr(g) 198.70 -36.29 H2 (g) 130.7 H2O2 (e) 109.6 -187.78 O2 (g) 205.07 O yes O no
8) a) Calculate AS°en for the following reaction given their respective standard molar entropy values. С-H- (6) + н, (в) сH. (8) S°(C,H2) = 200.9 J/mol K S°(H2) = 103.7 J/mol K S°(C;H4) = 219.3 J/mol K b) the reaction in 'part a' is endothermic, when would it be spontaneous?
Determine if the synthesis of sulfuric acid is a spontaneous reaction at 25°C. Chemical Equation: S + O₂ + H₂O → H₂SO4 2. Compute for the AS° rxn of the equation: Compound AH° (kJ/mol) S 0 H₂O -285.8 0₂ 0 H2SO4 -811.3 _J/K.mol (round off to 2 decimal places) AS (J/K-mol) 31.88 69.9 205 156.9
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ll Verizon ? 5:55 AM 9 100% webassign.net Among other things, an ideal fuel for the control thrusters of a space vehicle should decompose in a spontaneous exothermic reaction when exposed to an appropriate catalyst. Evaluate the following substances under standard state conditions as suitable candidates for fuels. (Provide AG° and AH° in kJ/mol reactant.) (a) nitrous oxide: N,0(g) → N2(9) + 1/2 0,(9) AG° = kJ/mol AH° = kJ/mol Spontaneity O spontaneous O nonspontaneous Thermicity O endothermic O exothermic Suitability O suitable O not suitable (b) diborane: B,H,(9) - 2 B(s) + 3 H,(9) AG° = kJ/mol AH° = kJ/mol Spontaneity O spontaneous O nonspontaneous Thermicity O endothermic exothermic Suitability O suitable O not suitable (c) dinitrogen trioxide: N,0,(9) – N,(9) + 3/2 0,(9) AG° = KJ/mol AH° - kJ/mol Spontaneity O spontaneous O nonspontaneous Thermicity O endothermic O exothermic Suitability O suitable O not suitable (d) aluminum hydride: AIH, (s) – Al(s) + 3/2 H,(9) AG° = kJ/mol ΔΗ' -…
Predict the sign of the entropy change, AS°, for each of the reaction displayed. Drag the appropriate items to their respective bins. View Available Hint(s) Ba²+ (aq) + SO₂² (aq)→BaSO4(s) 2KCIO3(s)→2KC1(s) + 302(g) Positive CO₂ (s)→CO₂(g) 2NO₂(g) N₂(g) +202(g) 2H₂(g) + O₂(g) →2H₂O(1) C3Hs (g) +502(g) → Reset Negative Help 3CO₂(g) + 4H₂O(g)
on Item 3 Review Constants Periodic Table Part C Complete previous part(s) Part D Calculate the standard-state entropy for the following reaction: 1 CHĄ(g) +2 O2(g) → 1 CO2(g) + 2 H2O(1) (If applicable, coefficients of one have been included for clarity.) The standard entropy values are given in the table. S° Formula J/(K-mol) CO2(g) 214 H2O(1) 189 CH4(g) 186 O2(g) 205 Express your answer with the appropriate units. • View Available Hint(s)
Predict the sign of the entropy change of the system for each of the following reactions. (Answer it please, I won't mind if the solution is incomplete)