(4) 2.50mol of Ar (ideal gas) initially at 298K and P= Ibar is heated until its volume is doubled. Find w done on the gas, q, AU, and AH if the process takes place at constant pressure, and P = Pext- Find AS, AS surr, and AStotal for surr spontaneous in those cases? Why? = 1000K and Tsurr = 298K. Is the process

(4) 2.50mol of Ar (ideal gas) initially at 298K and P= Ibar is heated until its volume is doubled. Find w done on the gas, q, AU, and AH if the process takes place at constant pressure, and P = Pext- Find AS, AS surr, and AStotal for surr spontaneous in those cases? Why? = 1000K and Tsurr = 298K. Is the process

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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Determine the values of AH', AS'and AG'for the following two reactions at 25 °C, using the data given in the table. Indicate if each of reactions is spontaneous or not Substance AH; (KJ'mol) S° (JKmo) AG; (kJ'mol) H-(g) 131 N2(g) 192 NH; (g) -46 193 -17 so,(g) -396 257 -371 H,0(1) -286 70 -237 H,SO, (aq) -909 20 -745 3 H2(g) + N, (g) - 2 NH3(g) b. So;(9) + H,0(1) - H,SO, (aq)
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
26. A mole of perfect gas at 27°C is expanded isothermally from an initial pressure of 3.00 atm to a final pressure of 1.00 atm in two ways (a) reversibly, (b) against a constant external pressure of 1.00 atm. Cal- culate q, w, AU, AH, AS, ASsurr, AStot for both. (+2.74 kJ, -2.74 kJ, 0, 0, 9.13 J/K, -9.13 J/K, 0 ||1.66 kJ, -1.66 kJ, 0, 0, 9.13 J/K, -5.53 J/K, 3.60 J/K) T=27°C 300 K b) w - - Peut av = -(1 atm) (ner - her NRT ) Pf P₁ IsoT w AU÷0 q = -((atm) 1 mol. 8.314 /mol.K - 300K I atm W = -16.6 kJ. 9 = 16.6 kJ AS: grev= UT Imol. 8.314 /mol.K·3.00K 3 atm 27. A block of copper of mass 500 g and initially at 293 K is in thermal contact with an electric heater of resistance 1 kOhm and negligible
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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 ? } ]
Be sure to answer all parts. From the following combinations of AH and AS, predict if a process will be spontaneous at a high or low temperature: (a) both AH and AS are negative Process is spontaneous at high and low temperatures. Process is spontaneous at high temperatures and nonspontaneous at low temperatures. Process is nonspontaneous at high and low temperatures. Process is nonspontaneous at high temperatures and spontaneous at low temperatures. (b) AH is negative and AS is positive Process is spontaneous at high and low temperatures. Process is spontaneous at high temperatures and nonspontaneous at low temperatures. Process is nonspontaneous at high and low temperatures. Process is nonspontaneous at high temperatures and spontaneous at low temperatures. (c) both AH and AS are positive Process is spontaneous at high and low temperatures. Process is spontaneous at high temperatures and nonspontaneous at low temperatures. Process is nonspontaneous at high and low temperatures.…
(Q74) A certain process is nonspontaneous at low temperatures. Given that AHX = 201.2 kJ and ASPxn = 876 J/K, at what temperature (in °C) will the process become spontaneous? %3D (Report your Celsius temperature to one decimal place --> if your answer has a decimal place of "O" and Canvas chops it off, don't worry about it).