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Hello! I just want to ask for help whether the answers in the given pictures are correct. If it's not, please help me recheck and resolve it. Please refer to the given pictures below for the answers and questions. Please read the instructions and directions very carefully. Double and triple check your answers, previous tutors got it wrong.   NOTE: Type only your answers. Please do not handwritten your answers. Make sure your formulas, solutions and answe

Hello! I just want to ask for help whether the answers in the given pictures are correct. If it's not, please help me recheck and resolve it. Please refer to the given pictures below for the answers and questions. Please read the instructions and directions very carefully. Double and triple check your answers, previous tutors got it wrong.   NOTE: Type only your answers. Please do not handwritten your answers. Make sure your formulas, solutions and answe

Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter10: Entropy And The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 10.50PAE: For the reaction NO(g)+NO2(g)N2O3(g) , use tabulated thermodynamic data to calculate H and S. Then...
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Hello! I just want to ask for help whether the answers in the given pictures are correct. If it's not, please help me recheck and resolve it. Please refer to the given pictures below for the answers and questions. Please read the instructions and directions very carefully. Double and triple check your answers, previous tutors got it wrong.

 

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A. Read each item carefully and choose the letter of the correct answer. 1. Which of the following statements best describes the Second Law of Thermodynamics? A. The internal energy of the universe is constant. B. Energy can neither be created nor destroyed. C. At absolute zero, the entropy of a crystal is considered to be zero. D. When an isolated system undergoes a spontaneous change, the entropy of the system increases. 2. Which of the following represents a spontaneous process? A. AS<0 B. AS-0 C. AG>0 D. AG<0 3. Which of the following has the most entropy? A. an empty classroom B. a tennis ball inside a box C. a flock of birds flying in V formation D. a crowd of people on the streets of Santa Rosa City B. Predict whether AS is positive or negative for the reaction: N₂(g) + O2(g) → 2NO(g) C. Which has greater entropy? 1mole of NaCl(5) or 1 mol of HCl(g) Expert Solution Step 1 Entropy is a calculate of the uncertainty or disarray of a system. The value of entropy based on the mass of a system. It is indicated by the letter S and has units of joules per kelvin. Entropy can have a non-inverse or inverse value. Step 2 1. Which of the following statements best describes the Second Law of Thermodynamics? Answer: Option D: When an isolated system undergoes a spontaneous change, the entropy of the system increases. Reason: a) For T = Ok Entropy s=0 (wrong) b) First law of thermodynamics c) For T = 0k Entropy s-positive for crystalline substance (wrong) Step 3 2. Which of the following represents a spontaneous process? Answer: Option D) AG<0 Reason: Spontaneous reaction - free energy should be there AG=AH-TAS AG <0 Remaining option are all wrong Step 4 3. Which of the following has the most entropy? Answer: Option D. a crowd of people on the streets of Santa Rosa City Reason: Entropy is a calculate of the uncertainty or disarray of a system. The value of entropy based on the mass of a system. It is indicated by the letter S and has units of joules per kelvin. Entropy can have a non-inverse or inverse value.
Transcribed Image Text:A. Read each item carefully and choose the letter of the correct answer. 1. Which of the following statements best describes the Second Law of Thermodynamics? A. The internal energy of the universe is constant. B. Energy can neither be created nor destroyed. C. At absolute zero, the entropy of a crystal is considered to be zero. D. When an isolated system undergoes a spontaneous change, the entropy of the system increases. 2. Which of the following represents a spontaneous process? A. AS<0 B. AS-0 C. AG>0 D. AG<0 3. Which of the following has the most entropy? A. an empty classroom B. a tennis ball inside a box C. a flock of birds flying in V formation D. a crowd of people on the streets of Santa Rosa City B. Predict whether AS is positive or negative for the reaction: N₂(g) + O2(g) → 2NO(g) C. Which has greater entropy? 1mole of NaCl(5) or 1 mol of HCl(g) Expert Solution Step 1 Entropy is a calculate of the uncertainty or disarray of a system. The value of entropy based on the mass of a system. It is indicated by the letter S and has units of joules per kelvin. Entropy can have a non-inverse or inverse value. Step 2 1. Which of the following statements best describes the Second Law of Thermodynamics? Answer: Option D: When an isolated system undergoes a spontaneous change, the entropy of the system increases. Reason: a) For T = Ok Entropy s=0 (wrong) b) First law of thermodynamics c) For T = 0k Entropy s-positive for crystalline substance (wrong) Step 3 2. Which of the following represents a spontaneous process? Answer: Option D) AG<0 Reason: Spontaneous reaction - free energy should be there AG=AH-TAS AG <0 Remaining option are all wrong Step 4 3. Which of the following has the most entropy? Answer: Option D. a crowd of people on the streets of Santa Rosa City Reason: Entropy is a calculate of the uncertainty or disarray of a system. The value of entropy based on the mass of a system. It is indicated by the letter S and has units of joules per kelvin. Entropy can have a non-inverse or inverse value.
(A). Prediction of the sign of AS is positive or negative for the reaction: N₂ (g) + O₂ (g) 2NO (g) :- →>> Entropy (S) is the extensive property of the system which measure the degree of disorder or randomness of the matter. Entropy increases from solid to liquid and liquid to gas because degree of disorder increases. Now, The given reaction is : N₂ (g) + O₂ (g) 2NO(g) Here, Number of moles of gaseous reactants = 1 + 1 = 2 moles Number of moles of gaseous products = 2 moles Because, number of moles of gases on both sides are equal, so sign of change in entropy, AS cannot be predicted. It can be calculated by using the formula as : AS = [Sum of entropy of products] - [Sum of entropy of reactants] Then, AS = [2 x Sº of NO (g)] - [Sº of N₂ (g) + Sº of O₂ (g)] = [2 x 210.8 J/K] - [191.6 J/K + 205.2 J/K] = 421.6 J/K - 396.8 J/K = + 24.8 J/K Therefore. sign of AS is positive for this reaction. Step 3 B. Which has greater entropy? 1 mole of NaCl (s) or 1 mole of HCl (g) :- 1 mole of HCl has the greater entropy than 1 mole of NaCl (s), because HCl is gas while NaCl is solid. So, due to more randomness of HCl (g) as compared to NaCl (s), 1 mole of HCl (g) has greater entropy.
Transcribed Image Text:(A). Prediction of the sign of AS is positive or negative for the reaction: N₂ (g) + O₂ (g) 2NO (g) :- →>> Entropy (S) is the extensive property of the system which measure the degree of disorder or randomness of the matter. Entropy increases from solid to liquid and liquid to gas because degree of disorder increases. Now, The given reaction is : N₂ (g) + O₂ (g) 2NO(g) Here, Number of moles of gaseous reactants = 1 + 1 = 2 moles Number of moles of gaseous products = 2 moles Because, number of moles of gases on both sides are equal, so sign of change in entropy, AS cannot be predicted. It can be calculated by using the formula as : AS = [Sum of entropy of products] - [Sum of entropy of reactants] Then, AS = [2 x Sº of NO (g)] - [Sº of N₂ (g) + Sº of O₂ (g)] = [2 x 210.8 J/K] - [191.6 J/K + 205.2 J/K] = 421.6 J/K - 396.8 J/K = + 24.8 J/K Therefore. sign of AS is positive for this reaction. Step 3 B. Which has greater entropy? 1 mole of NaCl (s) or 1 mole of HCl (g) :- 1 mole of HCl has the greater entropy than 1 mole of NaCl (s), because HCl is gas while NaCl is solid. So, due to more randomness of HCl (g) as compared to NaCl (s), 1 mole of HCl (g) has greater entropy.
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