10. The order on list of reducing agents from best to worst is this D. Cl >I >Ni

Question

10. The order on list of reducing agents from best to worst is this D. Cl >I >Ni(s) >Li(s) 11 What is the potential for the cell below: o A. 2.18V B. 1.09V C. 1.59V D, 0.B6V 2 12. In the Cell described E is positive so what else is also true? A. AG is negative AG is zero S AG is positive x D. The reaction will never stop until all the reactants are gone. 13. When an electrochemical cell has achieved chemical equilbrium a. A positive AG and E b. A negative AG and E c, A AG and E 0 d, A AG and E w oo e. A positive AH and a negative AS 14-17At 1 Atm, liquid water is cooled to -10.0 C The change for the water is: Hao() Ho(s) 14. Asurr for this process is A ter than zero B) less than zero C) equal to zero to answer this question D) more information needed 15. ASys for this process is A) greater than zero B) less than zero

Explanation / Answer

1. Standard electrode potential is an indication of reducing tendency. More -ve the electrode potential, stronger is the reducing agent. Hence Li>Ni>I->Cl-

2. Ni-------->Ni+2 +2e-, Eo= 0.23V, (1), I2+2e- ----->2I-, Eo=0.54V (2). Addition of Eq,1 and Eq.2 gives

Ni + I2------->Ni+2 + 2I-, Eo=0.54+0.23= 0.77V

3. since Eo is +ve, deltaG=-nFE is -ve. ( A is correct)

4. Equilibrium, deltaG=0 , since deltaG=-nFE=0, E=0 and hence at equilibrium, deltaG=0 and E=0

5. During cooling, system entropy decreases. since degree of disorder decreases. however surrounidngs disorfer increases. So entropy of surroundings>0

6. Cooling is not spontaneous. hence deltas of the process <0

7.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

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