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Question

For the following cell-reaction,

Cu(s)+2Ag+(aq)2Ag(s)+Cu2+(aq).

Ecell is 0.46 V at 300 K and 0.48 V at 310 K

The temperature coefficient of the e.m.f of the cell in above questions is:

A
0.02 VK1
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B
0.2 VK1
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C
0.002 VK1
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D
2 VK1
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Solution

The correct option is C 0.002 VK1
In this question, EMF increases with increase in temperature, i,e. (δEδT)P is positive.

Therefore,
Temperature coefficient, (δEδT)P=0.480.46310300=0.0210=0.002VK1

The correct answer is option C.

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