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Author Question: The cell reaction for a dry cell battery isZn(s) + 2 MnO2(s) + 2 NH4+(aq) 2 NH3(aq) + Mn2O3(s) + ... (Read 160 times)

Kthamas

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Question 1

What is the relation between joules (J), volts (V), and coulombs (C)?
◦ 1 J = 1 V × 1 C2
◦ 1 J = 1 V × 1 C
◦ 1 J = 1 C ÷ 1 V
◦ 1 J = 1 V ÷ 1 C

Question 2

The cell reaction for a dry cell battery is

Zn(s) + 2 MnO2(s) + 2 NH4+(aq) → 2 NH3(aq) + Mn2O3(s) + Zn2+(aq) + H2O(l).


The standard cell potential for this cell is 1.56 V. What is the standard free energy change for this cell?
◦ +151 kJ
◦ -301 kJ
◦ -602 kJ
◦ -151 kJ


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Marked as best answer by Kthamas on Feb 15, 2020

gasdhashg

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Kthamas

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Reply 2 on: Feb 15, 2020
Thanks for the timely response, appreciate it


sultana.d

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Reply 3 on: Yesterday
Excellent

 

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