Calculate the standard entropy change for the reaction 2H2(9) + O2 (9)→2H;O(1) using the data from the following table: Substance AH; (kJ mol-1) AG° (kJ mol-1) S° (J K-1 mol-1) H2(9) 0.00 0.00 130.6 O2 (9) 0.00 0.00 205.0 H20(1) -285.8 -237.2 69.90 Express your answer to four significant figures and include the appropriate units.

Calculate the standard entropy change for the reaction 2H2(9) + O2 (9)→2H;O(1) using the data from the following table: Substance AH; (kJ mol-1) AG° (kJ mol-1) S° (J K-1 mol-1) H2(9) 0.00 0.00 130.6 O2 (9) 0.00 0.00 205.0 H20(1) -285.8 -237.2 69.90 Express your answer to four significant figures and include the appropriate units.

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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If AS at 25°C sys =-198.3 J/K, is the reaction spontaneous N2 + 3H2 → 2NH3 • AS univ = AS sys + AS surr > ? AS surr (AHsys)/T Determine the AHrxn • AH° N2(g) = 0 kJ/mol • AH° H2(g) = 0 kJ/mol • AH°; NH3(g) = -46.19 kJ/mol
The energy produced by a spontaneous reaction is often used to provide the energy to drive nonspontaneous reactions. For example, the conversion of ATP to ADP in our cells acts as the energy source for the nonspontaneous reactions that combine amino acids during protein synthesis. Here is the conversion of ATP to ADP: ATP(aq) + H,O = ADP(aq) + HPO,²-(aq) AG° = -30.0 kj/mol A typical reaction combining two amino acids during protein synthesis has a AG = 15.0 kJ/mol. What is the minimum ATP concentration required to provide the energy to combine 1 mole of amino acid synthesis (total energy = 15.0 kJ)? Assume that the concentration of ADP = 9 µM (micromolar) and HPO42- = 4 mM (millimolar). %3! %3D
Use the data provided in the table to calculate the change in Gibbs Free-Energy at 25 degrees Celsius for the reaction given. Ag+ (aq) Cl- (aq) AgCl (s) S0 (J K-1 mole-1) 72.68 56.4 96.2 Delta H Kj/mol 105.58 -167.2 -127.07 Group of answer choices -75.2 kJ +55.7 kJ +32.5 kJ -75.2 kJ -55.7 kJ
6) What is the entropy change (J/K) for a system containing 3.00 mol of an ideal gas at 25.0 oC which is allowed to expand from 1.25 L to 5.00 L?
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O ENTROPY AND FREE ENERGY Using reaction free energy to predict equilibrium composition D 3/5 Consider the following equilibrium: 2NOC1 (g) - 2NO (g)+ Cl, (g) AG" =41. kJ Now suppose a reaction vessel is filled with 2.68 atm of nitrosyl chloride (NOCI) and 3.74 atm of chlorine (Cl,) at 227. °C. Answer the following questions about this system: rise Under these conditions, will the pressure of Cl, tend to rise or fall? fall Is it possible to reverse this tendency by adding NO? In other words, if you said the pressure of Cl, will tend to rise, can that yes be changed to a tendency to fall by adding NO? Similarly, if you said the no pressure of Cl, will tend to fall, can that be changed to a tendency to rise by adding NO? If you said the tendency can be reversed in the second question, calculate the minimum pressure of NO needed to reverse it. | atm Round your answer to 2 significant digits. II
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For each of the following reactions, decide whether entropy is increasing (+AS) or decreasing (-AS). (a) 2CH4(g) + 2CO2(g) C2H4(g) + 2H,0(g) + 2CO (g) (b) CO2(g) + 3H2(g) CH;OH(g) + H,O(g) (c) CH;OCH;(g) + H20(g) 2CO(g) + 4H2(g)
M Preq 3 Consider the reaction 00 E D 4HCI(g) + O₂(g) 2H₂O(g) + 2Cl₂(8) for which AH° = -114.4 kJ and AS° = -128.9 J/K at 298.15 K. J/K (1) Calculate the entropy change of the UNIVERSE when 1.775 moles of HCI(g) react under standard conditions at 298.15 K. ASuniverse (2) Is this reaction reactant or product favored under standard conditions? Submit Answer (3) If the reaction is product favored, is it enthalpy favored, entropy favored, or favored by both enthalpy and entropy? If the reaction is reactant favored choose 'reactant favored'. 4 000 000 R F DO LO V % 5 [Review Topics] [References] Use the References to access important values if needed for this question. T Retry Entire Group 8 more group attempts remaining Cengage Learning Cengage Technical Support G 6 B Y H & 7 N U 1 * 8 J M 9 K बैं O < L P Previous Email Instructor Save and Exit { + 11 Next ? } ]
Calculate AG°for the combustion of propane. C3H8(g) + 502(g) → 3CO2(s) + 4H20(g) Standard Thermodynamic Properties for Selected Substances Substance AH; (kJ mol-) AG; (kJ mol-1) S° (JK-1 mo Co3 2 (aq) -677.1 -527.8 -56.9 CH4(g) -74.6 -50.5 186.3 CH3OH() -239.2 -166.6 126.8 CH3OH(g) -201.0 -162.3 239.9 CCI4() -128.2 -62.5 214.4 CCIA(9) -95.7 -58.2 309.7 CHCI3() -134.1 -73.7 201.7 CHCI3(g) -103.14 -70.34 295.71 CS2() 89.70 65.27 151.34 CS2(g) 116.9 66.8 238.0 209 2 200.9 027 4
Estimate the entropy change for the reaction: 2NO2 (g) + N204 (g) Standard entropy and enthalpy of formation S (U/mol K) Species H>(8) H(g) O:(8) O(g) N:(g) N(g) NO(g) H,O (g) H;0 (1) N,0 (g) NO2 (g) N2O N,Os(g) N20s(s) NHANO,(s) AH", (kJ/mol) 130.6 114.6 218.0 205 161 249.2 191.5 153.2 472.7 210.7 90.25 188.7 -241.8 69.91 -285.8 219.7 82.05 240.0 33.2 304.2 9.2 356 11 178 -43.1 151.1 -365.6