12) 12) If G_-1.00 kJ for reaction at 298 K,what is Ecell for this reaction? Ass
ID: 588665 • Letter: 1
Question
12) 12) If G_-1.00 kJ for reaction at 298 K,what is Ecell for this reaction? Assume that it is a redox reaction in which 2 moles of electrons are transferred (n-2)? A. 0.00 V B. 1.67 V C. 0.190v D. 0.0052v 13) 13) What is AG for the evaporation of 1 mole of water at 298 K? AHor (kJ/mol) -285.8 -241.8 S°2ss (J/mol-K 69.9 Substance H20(B) 188.8 A. 8.57 kJ. B. 44.0 k. C. 112.0 kJ D. 79.4 k 14)- 14) What process results in conversion of mass to energy? A. fusion B. fission C. decay D. all of the above 15) 15) During the electrochemistry lab, you noticed that a piece of Mg metal changed color when put into a CuSO, solution. From this you can conclude that: A. Mg accepts electrons more readily than Cu B. Cu accepts electrons more readily than Mg C. SO is an oxidizing agent. D. MgSO4 is deposited onto Mg metal.Explanation / Answer
12)
Here number of electrons being transferred = 2
deltaG = -1.0 KJ/mol
deltaG = -1000.0 J/mol
F = 96500.0 C
we have below equation to be used:
deltaG = -n*F*E
-1000= -2*96500.0*E
E = 0.0052 V
Answer: D
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