&Click Submit to complete this assessment. estion 15 Two bulbs with the same volume are connected by a tube with a stopcock. There are 4.8 moles of an ideal gas in the first one and the second one is evacuated. We open the stopcock and the gas expands to the evacuated bulb. What is the entropy change (AS), in JK-1, of this expansion? Close Window

&Click Submit to complete this assessment. estion 15 Two bulbs with the same volume are connected by a tube with a stopcock. There are 4.8 moles of an ideal gas in the first one and the second one is evacuated. We open the stopcock and the gas expands to the evacuated bulb. What is the entropy change (AS), in JK-1, of this expansion? Close Window

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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Suppose we're interested in studying ligaments. In class, we have focused on Problem 1 work done by changes in volume, but our initial framework presented accommodates other forms of work as well. When a ligament is stretched, we may represent the work done on the system as follows: dw fdl - pdV || Here, fis the restoring force of the ligament that opposes stretching, and /is the length. The differential expression for the Gibb's free energy can be written as follows: dG = Vdp – SdT + fdl differential expression. dA. a) Write all Maxwell relations from the Gibb's free energy energy, b) Derive the differential expression for Helmholtz free
AND FREE ENERGY Predicting qualitatively how entropy changes with temperature.. 0/5 For each system listed in the first column of the table below, decide (if possible) whether the change described in the second column will increase the entropy S of the system, decrease S, or leave S unchanged. If you don't have enough information to decide, check the "not enough information" button in the last column. System Change AS O AS 0 not enough information O AS 0 not enough information O AS 0 not enough information Explanation Check O2022 McGraw Hill LLC. All Rights Resenrved. Terms of Use Privacy Center Accessibility To search IA 99
Activity 1: Counting Microstates and Calculating Probabilities If there is only one molecule of gas in the system (N=1), then there are 2 possible microstates for the system. If N=2, there are 4 possible microstates. This becomes easy to see if you think of all the possible ways to arrange the molecules and draw a diagram of each one, as shown below. N =1 moleye N = 2 1. In the space below, draw a sketch of all possible microstates for N = 3. Use different shapes or different colors so you can tell the particles apart. You should work it out on scratch paper first. What is the total number of microstates? 2. In the space below, draw a sketch of all possible microstates for N = 4. What is the total number of microstates? uodyot
The change in entropy, ASxn, is related to the the change in the number of moles of gas molecules, Angas. Determine the change in the moles of gas for each of the reactions and decide if the entropy increases, decreases, or has little or no change. А. 2 H, (g) + O,(g) 2 H,O(1) An gas The entropy, ASixn, mol O has little or no change. O decreases. O increases. В. H,0,(1) H, (g) + O,(g) The entropy, A.SPxn, Angas = mol O increases. O decreases. has little or no change. O O
# Consider the reaction 20 E D 2NH3(g) + 3N₂O(g) → 4N2(g) + 3H₂O(g) for which AH = -879.5 kJ and AS = 288.1 J/K at 298.15 K. 1. Calculate the entropy change of the UNIVERSE when 1.642 moles of NH3 (9) react under standard conditions at 298.15 K. $ Submit Answer 4 ASuniverse J/K 2. Is this reaction reactant or product favored under standard conditions? 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'. 000 000 R F do L % [Review Topics] [References] Use the References to access important values if needed for this question. 5 O Retry Entire Group T Cengage Learning Cengage Technical Support G ‹ 6 8 more group attempts remaining Y H & 7 U 8 J 1 ( 9 K O O L P > Previous Email Instructor Save and Exit + 11 ( Next ? 11 } ] d
A eq req E Consider the reaction: 2SO₂(g) + O2(g) → 2SO3(g) Using standard thermodynamic data at 298 K, calculate the free energy change when 1.57 moles of SO₂(g) react at standard conditions. AG = Substance AG (kJ/mol) SO3(g) SO₂(g) 0₂ (9) Submit Answer $ R % k] 5 Show Hint Use the References to access important values if needed for this question. T -371.1 -300.2 0.0 Retry Entire Group B Cengage Learning Cengage Technical Support ^ 6 9 more group attempts remaining H & 7 N J * 8 M 1 K ( 1 O P Previous Next> D ㅈ R 7 Save and Exit
Mark the correct statements. (Select all that apply.) O [The reaction 2H20(g) → 2H2(g) + O2(g) is expected to have a positive value of ASº.] O [If a sample of pure ozone changed to oxygen at constant T and P, the entropy of the sample would decrease.] O [For the process H20(1) → H20(s) occurring at 0°C and 1 atm, the sign of AS is negative.] O [The value of AS for the process CHC13(1) – CHC13(g) is negative.] O [The reaction CH4(g) + 202(g) → CO2(g) + 2H2O(g) has a negative value of ASsurr-]
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5 moles of monatomic ideal gas are conducted through the process shown in the PV diagram below. The system follows the path ABC. Curve BC represents an isothermal path.a) For the path ABC, determine whether the system absorbs or emits heat and calculate the magnitude of this heat.b) Calculate the change of internal energy and entropy of the gas in the path ABC.c) Calculate the entropy change of the gas in the process AB and BC. Explain in your own words wthat means the entropy change of the BC process using the definition of entropy in terms of the accessible microstates of the system.