Find the neutral temperatuer and inversion temperature of copper-iron thermocouple if the reference junction is kept at `0^@ C`. Use the dat in table.

Answer

C

Explanation

`theta = 0^@C`
`, a Cufe= aCuPb - aFePb `
`= 2.76 mv //^@C- 16.6mu//^@C`
` = bCuAg = bCuPb - bAgPb `
`= 0.012mv//^@C^2 + 0.030 mu//^@C^2`
` `
`= 0.02 mu//^@C^2`
` Neutral temp `
`theta`
` on `
`(-a)/(b) = (13.8)/(0.0420c) = 328.570 C`
` 1 equivalent mass of the substance requires 96500 coulombs. Since the element is diatomic, thus equivalent mass = mol mass `
`=6.023 xx10^23`
` atoms require 96500 C, 1 atoms require `
`(96500)/(6.023 xx 10^23)C`
`=1.6 xx10^(-19) C (b) Since the element is diatomic equivalent mass `
`=(1)/(2)`
` mol. mass `
`= (1)/(2) xx 6.023 xx 10^23 atoms require 96500 C`
` rArr 1 atom requires = 1.6 xx 2 xx 10^(-19) C = 3.2xx 10^(-19) C