Question

6. The following data are obtained for solutions of NH3-H2O at 70°F. Given that Henry's constant for NHs is 858 torr, a. Calculate activity c0efficient of NH, in these solutions if treated as solute b. calculate activity coefficient of H2O if treated as solvent x(NH) P(H2O) torr P(NHs) torr 0.10 16.5 0.20 0.15 0.0 0.05 14.5 15.5 134.5 17.6 42.9 18.6 221.3 0.0 78.6

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Answer 1

Chive n Salutisn o N Hr 6 Heyry's Gondat of 1-12 8at w hem P= o. to 728 atm Ay HemmsLos & conpetrat on whare C Kn. P Pre&sn. of gos KHemry 's constant Nous C RO given actual C২ cजo) Em) O M. NOus E Etfeetive concetraton Ce) activity copffecdent ) actual concetratin m) Case-I whem OO55 atm p u2.9 tor 126 Xa0S C = O62M l025 1 Oo5

Coise tu When 10 M .to3 atm P = I16 M Lo3 x1 128 116 l166 Cous-Iv When P 134.5 tor .176 atm CEN7GK 1128 Y 199 =1.33 Cause-y p: 221.3 tor -291atm 1128X-29 328 M 328 1.64 20 Cb). Heys Law It smt worle work gas. SOMution. So We Cem't ot activity cofficientot CHo) H2o ts tti JLiqui al