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Grade: 12th pass
        
The temperature coefficient of emf, i.e., dE/dT = -4.02×10-4 volt deg-1 for a cell. The enthalpy change for the cell is (n=2, Ecell = 1.015V, T = 293K)
3 years ago

Answers : (2)

Umakant biswal
5349 Points
							
@ rishikesh 
del g = – nf enot cell 
n =2 
F= 96485 
e not cell = 1.015 v 
del g = -2 * 96485 * (-1.015 ) = 195864.55
delg = del h- t del s 
del s = de/dt = -4.02 * 10 ^ -4 
del h = del g + t del s 
t = 293 k 
= 195864.55+293*(-4.02*10^-4) 
HOPE IT CLEARS YOUR DOUBT 
ALL THE BEST ..
3 years ago
Swapnil admane
15 Points
							
If the EMF of the cell at 20°C and 30°C are 0.6973 and 0.6998 volt respectively, calculate its temperature coefficient.
3 months ago
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