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**At a temperature of 710 K, the vapour pressure of pure liquid Zn is given by: pZn(Xzn = 1.0) = 3.6 × 10−4 atm. The Raoultian activity coefficient (γZn) of Zn in Zn-Cd alloy liquid at 710 K is approximated by: ln(γZn) = 0.875(1 − XZn) 2 The ratio [ pZn(Xzn=0.7) pZn(Xzn=1.0) ] for a liquid alloy with Xzn = 0.7 is __________ (to two decimal places). Gate-2018-General-Aptitude**

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## At a temperature of 710 K, the vapour pressure of pure liquid Zn is given by: pZn(Xzn = 1.0) = 3.6 × 10−4 atm. The Raoultian activity coefficient (γZn) of Zn in Zn-Cd alloy liquid at 710 K is approximated by: ln(γZn) = 0.875(1 − XZn) 2 The ratio [ pZn(Xzn=0.7) pZn(Xzn=1.0) ] for a liquid alloy with Xzn = 0.7 is __________ (to two decimal places). Gate-2018-General-Aptitude

## Derive the formula and answer the question .

Asked On2019-05-31 12:10:15 by:Jaynil-Gaglani

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Download question setAnswersfirst calculate 𝛾𝑍𝑛

Pzn = 𝛾𝑍𝑛(mole fraction of zn i.e 0.7) * Partial pressure at standard state

(p=𝛾𝑍𝑛 *X zn*P0)

then partial pressure cancels on both numerator and denominator.

0.757

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