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Empirical & Molecular Formula

The thermo em...

Question

The thermo emf of Sb against lead is +4.3 mV and that of Bi against lead is -6.9 mV when the cold junction is at $0^{0} C$ and hot junction is at $100^{0} C$ . The emf of Sb- Bi thermocouple for the same temperatures is

A

-2.6mV

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B

11.2mV

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C

+2.6mV

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D

25.67mV

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Solution

The correct option is B 11.2mV
The emf of Sb-Bi thermocouple is given as $E = 4.3 - (- 6.9) = 11.2 m V$

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