lluh the ron electrode to the chromium electrode C. Oxidation is taking place at

Question

lluh the ron electrode to the chromium electrode C. Oxidation is taking place at the iron electrode D. K ions from the salt bridge flow to the iron electrode NO ons from the salt bridge flow to the iron electrode 16. t a given set of temperature and pressure conditions. the reaction below has a NG ky but the reaction not appear to proceed at those conditions. Which of 316 occurrence? the following is the best explanation for this A(s) 2 B(g) heat A. The reaction is not spontaneous. B. The entropy change of the system is negative. C. The activation energy for the reaction is too large. D. The reaction is endothermic 17. A reaction has a AH +54.2 kJ. Calculate the entropy change for the surroudings (AS surn) for the reaction at 25.00C (Assume constant pressure and temperature.) A. ASsurr +2.17 x 103 J/K B. ASsurr 2.17 x 103 J/K C. Surr 182 J/K D. ASsurr 182 J/K E. ASsurr 1.94 x 103 J/K

Explanation / Answer

Satisfying the criteria for Gibb's free energy would ensure that the reaction would be spontaneous under those conditions. Also, the solid turning into gaseous form, tells us that the entropy change is positive. Also, a reaction being endothermic is no reason for a reaction to not occur. So, the activation energy must be very high for the reaction to begin, once it starts it can occur spontaneously at conditions satisfying Gibb's free energy.

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