PrintCalculator mm Periodic Table 11 Eboo stion 15 of 20 (1 point) The general r

Question

PrintCalculator mm Periodic Table 11 Eboo stion 15 of 20 (1 point) The general reaction below has the following standard thermodynamic parameters: Hf mam and S'm = 78.5 J/(K-mol). Complete parts a, b, c, and d below. mic parameters. Arran = 34.4 kJ/mol Belt. a. Is the reaction exothermic or endothermic? O Exothermic O Endothermic b. Does the positive entropy change make sense? Why or why not? O O O O No, because order increases as the number of molecules increases No, because order decreases as the number of molecules increases. Yes, because order increases as the number of molecules increases. Yes, because order decreases as the number of molecules increases Check Answer Views 0 Hint Progress10 12 16 18 19.> Exit Actr Activity Grade: 20 Points Possible

Explanation / Answer

a) Change in enthalphy, delta H is positive so this reaction is

   Endothermic reaction.

b) Yes, because order decreases as the number of molecules increases.

c) Delta G = delta H - T delta S

If delta G is negative then reaction is spontaneous

For delta G negative we should increase the temperature.

Answer is : The reaction is not spontaneous at all temperatures because delta G is only negative at high temperatures as delta S is positive.

d) For spontaneous

deltaG < 0 (negative)

Delta H - T delta S < 0

T > delta H/delta S

   > (34.4 kJ/mol) /78.5 J/mol.K

   > 438.2 K

reaction is spontaneous above 438.2 K

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.