An electrolyte of a polymer-salt complex of poly (ethylene oxide) - LiCF 3 SO 3 is shaped into a free standing circular film of 20 mm diameter and a thickness of 20 μ m . When it is sandwiched between 2 stainless steel circular electrodes of the same diameter, this cell exhibits a conductance of 314 5 S . What is the specific conductivity of the electrolyte?

Question

An electrolyte of a polymer-salt complex of poly (ethylene oxide) - LiCF 3 SO 3 is shaped into a free standing circular film of 20 mm diameter and a thickness of 20 μ m . When it is sandwiched between 2 stainless steel circular electrodes of the same diameter, this cell exhibits a conductance of 314 5 S . What is the specific conductivity of the electrolyte?, 4 mS cm - 1, 0 . 4 S cm - 1, 40 mS cm - 1, 0 . 004 S cm - 1

MARKS App · Accepted Answer

Specific conductance is given by κ = 1 R × l A Here thickness is 20 × 10 - 4 cm and radius is 1 cm So κ = 314 5 × 20 × 10 - 4 3 . 14 × 1 2 = 0 . 04 Scm - 1 κ = 40 mS cm - 1

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