12. Consider the reaction H₂(g)+ S(s)→ H₂S(g) for which AH = -20 kJ and AS = +43 1K-¹ at 298.15 K. Choose the TRUE statement.A)The reaction is spontaneous only above a temperature of 465 K.B) The reaction is not spontaneous at 298.15 K.C)The reaction is spontaneous at all temperatures.D) The reaction is not spontaneous at any temperature.E) The reaction is driven by enthalpy only.

Given here a reaction with its enthalpy change and entropy change valuesat 298.15 K. We are asked to…

12. Consider the reaction H₂(g)+ S(s)→ H₂S(g) for which AH = -20 kJ and AS - +43] Kat 298.15 K. Choose the TRUE statement. A) The reaction is spontaneous only above a temperature of 465 K. The reaction is not spontaneous at 298.15 K. B) C) The reaction is spontaneous at all temperatures. D) The reaction is not spontaneous at any temperature. E) The reaction is driven by enthalpy only.

12. Consider the reaction H₂(g)+ S(s)→ H₂S(g) for which AH = -20 kJ and AS - +43] Kat 298.15 K. Choose the TRUE statement. A) The reaction is spontaneous only above a temperature of 465 K. The reaction is not spontaneous at 298.15 K. B) C) The reaction is spontaneous at all temperatures. D) The reaction is not spontaneous at any temperature. E) The reaction is driven by enthalpy only.

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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Similar questions

For a specific reaction, AH = -25.8 kJ/mol and AS = +45.6 J/K-mol. Which of these statements is true? O The reaction is never spontaneous. O The reaction is only spontaneous at high temperatures. OThe reaction is spontaneous at all temperatures. The reaction is only spontaneous at low temperatures.
5.) Which of the following statements accurately describes the spontaneity of the reaction below?Al2O3(s) + 2Fe(s) → 2Al(s) + Fe2O3(s) H°rxn = 830.8 kJ/mol, S°rxn = 168 J/mol·K a. The reverse reaction is always spontaneous.b. The reaction is spontaneous above 4945 K.c. The reaction is spontaneous below 4945 K.d. The reaction is always spontaneous.e. There is not enough information to determine.
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Chemistry Above what temperature does the following reaction become non-spontaneous? 2 H₂S(g) + 3 O₂(g) → 2 SO₂(g) + 2 H₂O(g) AH = -1036 kJ; AS = -153.2 J/K O 158.7 K This reaction is nonspontaneous at all temperatures. O 298 K This reaction is spontaneous at all temperatures O 6.762 × 103 K
For the reaction of gaseous substances with increasing gaseous molecules (from reactant to product side) and given the ΔH° that is +150 kJ/mol and ΔS° that is +171 J/K ∙ mol, how can you describe this reaction? a. It is spontaneous only at low temperatures. b. It is spontaneous only at high temperatures. c. It is spontaneous all the time. d. It is non-spontaneous.
9) For which set of values of AH and AS will a reaction be non-spontaneous at 25°C? a) AH• = -10 kJ, AS = - 15 J b) AH• = - 10 kJ, AS= +5 J c) AH° = + 5 kJ, AS = +8J
C3H8 (g) + 502 (g) --> 3CO2 (g) + 4H2O (g) + 2200 k) Given the above equation, which statement is correct? A. can be spontaneous at all temperatures B. can be spontaneous at high temperatures O C. can be spontaneous at low temperatures D. can be spontaneous at no temperatures
If a process is exothermic and not spontaneous, then what must not be true? a) AG>0 b) AH0 d) AS<0
If the process is exothermic and not spontaneous, then what must be TRUE? O a. AS0 O c. AH=0 O d. AS> 0
Using the information in the table below, for which of these substances will vaporization be spontaneous at standard temperature and pressure?
Chemistry Written by hand.
At what temperatures will a reaction be spontaneous if AH = +158 kJ and AS = +411 %3D J/K? O The reaction will never be spontaneous. O The reaction will be spontaneous at any temperature. O All temperatures above 384 K O All temperatures below 384 K