i: owLV2 | Online teachin- O | sjc.cengagenow.com/ilr keCovalentActivity.do?loca

Question

i: owLV2 | Online teachin- O | sjc.cengagenow.com/ilr keCovalentActivity.do?locator=assignment-take&takeAssignmentSessionLocator;= as Chapter 10: Mastery 1. Compare Absolute Entropies Use the References to access important values if needed fo r this question. 2. Predict the Sign of S Consider the reaction: Calculate 1 pts 2req Question Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 2.00 moles of NH NO3(aq) react at standard conditions ASourroundings = J/K 4. Standard Entropy of Reaction 1 pts 2req 1 pts 2req Submit Answer Retry Entire Group 6 more group attempts remaining 6. AG: Predict Signs 78G: Enthalpy. Entropy and Temper 1 pts 8. AG: Calculate Temperature Limit 1 pts 2req 9. Thermodynamics of Refining Met... 1 pts 2req 10. AG from Free Energies of Form 1 pts 2req 1 pts 2req

Explanation / Answer

Ans. dS = S(products) - S(reactants)

= S(N2O) + 2S(H2O) - S(NH4NO3)

= 219.7 + 69.91 - 259.8

= 29.81 J/Kmol

for 1 mole, dS = 29.81 J/K

for 2 mole, dS = 29.81 * 2 = 59.62 J/K

=

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