Homework Answers
Ans 1 :
Entropy is the degree of disorderness or randomness of the system. The molar entropy refers to the entropy of one mole of substance in standard state.
So here :
a)
The molar mass of of hydrogen halides increase from left to right in the table , so does the molar entropy of these compounds.
This is because, higher the molar mass of the compound , more is the molar entropy.
b)
Same trend is observed in the case of nitrogen oxides also. Higher the molar mass of compounds , greater is the molar entropy. So molar entropy of the compounds increase from left to right as the molar mass increases.
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of the two compounds which compound will have higher standard molar entropy at 25 °C h H CH H H <I TIN
Calculate the entropy change of the following reaction (in JK) the following standard entropy values (given...
Calculate the entropy change of the following reaction (in JK) the following standard entropy values (given in J/mol-K): A-2922, B-2424. C-2618, D = Number J/K
The standard molar entropy of NHz is 192.45 JK+mol-1 at 298K, and its heat capacity is...
The standard molar entropy of NHz is 192.45 JK+mol-1 at 298K, and its heat capacity is given by the equation Com= a +bT +c/T2 with the coefficients given in the table below. Calculate the standard molar entropy of NH3 at 100 °C. Please explain as much as possible. Why did you use the equation? Or what conditions did you see from the question? etc. Table 1: Temperature variation of molar heat capacities, Cp /K-mol-?) = a +bT + c/T2 b/(10-3K-1)...
17. Using values for the standard enthalpies of formation (AH:9) and standard molar entropy (439) on...
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Which of the following has the highest standard molar entropy at 298 K? N2(s) He(g) CH4(l)...
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Without referring to a data table, rank the following compounds by standard molar entropy. . Highest...
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Using the standard entropy values: NOG), S = +210.6 J mol-1 K-1 02(0), sº = +205.0...
Using the standard entropy values: NOG), S = +210.6 J mol-1 K-1 02(0), sº = +205.0 J mol-1 K-1 NO2(g), sº = +240.5 J mol-1 K-1 calculate the standard entropy change, Asº, for the reaction: NO(g) + O2(g) NO2(g) A.-246.1 kJ B. +246.1 kJ C.-175.1 kJ D.-656.1 kJ E. -72.6 kJ
1. Which of the following is in the correct order of standard state entropy? I. Liquid...
1. Which of the following is in the correct order of standard state entropy? I. Liquid water < gaseous water II. Liquid water < solid water III. NH; <H3 a. I only b. II only III only d. I and II only e. I and III only c. 2. Which of the following will have the greatest standard molar entropy (Sº)? a. NH3(g) d. H2O(1) b. He(g) CaCO3(s) c. C(s, graphite) e. 3. Indicate which of the following has the...
1. Which of the following will have the greatest standard molar entropy (Sº)? a. NH3(g) d....
1. Which of the following will have the greatest standard molar entropy (Sº)? a. NH3(g) d. H:0(1) b. He(g) e. CaCO(s) c. C(s, graphite) 2. Indicate which of the following has the highest entropy at 298 K. a. 0.5 g of HCN b. 1 mol of HCN c. 2 kg of HCN d. 2 mol of HCN e. All of the above have the same entropy at 298 K. EVALUATING AS FOR REACTIONS (non-math recognition) 3. Indicate which one of...
Arrange the following gases in order of decreasing standard molar entropy: N204(9), NO(g), NO2(g). Select one:...
Arrange the following gases in order of decreasing standard molar entropy: N204(9), NO(g), NO2(g). Select one: O a. N204> NO > NOZ O b. N204 > NO2 > NO O C. NO2 > NO > N20. O d. NO > NO2 > N204 e. NO > N204 > NO2 Which of the following reactions will shift to the left if the volume is decreased? Select one: H2 (8) + Cl2 (8) DIL 2 HCI (8) OD b. 2 SO3 (8)...
Please explain which. Thanks.
of the two compounds which compound will have higher standard molar entropy at 25 °C h H CH H H <I TIN
Calculate the entropy change of the following reaction (in JK) the following standard entropy values (given in J/mol-K): A-2922, B-2424. C-2618, D = Number J/K
The standard molar entropy of NHz is 192.45 JK+mol-1 at 298K, and its heat capacity is given by the equation Com= a +bT +c/T2 with the coefficients given in the table below. Calculate the standard molar entropy of NH3 at 100 °C. Please explain as much as possible. Why did you use the equation? Or what conditions did you see from the question? etc. Table 1: Temperature variation of molar heat capacities, Cp /K-mol-?) = a +bT + c/T2 b/(10-3K-1)...
17. Using values for the standard enthalpies of formation (AH:9) and standard molar entropy (439) on the Appendix, calculate the following thermodynamic values for the complete combustion of ethanol: (10 points) C2H5OH(g) + 302(g) → 2CO2(g) + 3H2O(g) a) The standard enthalpy change (AHº) b) The standard entropy change (AS) c) Use values from a) and b) above to calculate AGO at 298K d) Is this reaction spontaneous at 298K under standard conditions?
Without referring to a data table, rank the following compounds by standard molar entropy. . Highest S HF(g) Ne(g) F2(g) Lowest S Which of the following reactions is likely to be product favored based on energetic considerations? (You can select more than one reaction) 2 Na(s)+ Ch(g)-> 2 NaC(s) 2 NHs(g)->No(9)+ 3 H2(9) CH4g) +2 H200)-> COg) H4 H2(9)
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