PHYSICAL CHEMISTRY IN BRIEF

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 201 0 x^11 0 1 y 1 6 x 1 =y 1 Obr.7.8:y−xdiagrams of two two-component systems. The bold li ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 202 When there is a minimum on the curve of boiling temperatures in an isobaric diagram fo ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 203 The increase in the boiling temperature at constant pressureis given by the relation ∆ ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 204 7.6.8 High-pressure liquid-vapour equilibrium. The calculation of liquid-vapour equilib ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 205 7.7 Liquid-gas equilibrium in mixtures This problem concerns the solubility of gases in ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 206 At low pressures, the gaseous phase may be approximated by an ideal gas, and the fugac ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 207 7.7.3 Estimates of Henry’s constant Henry’s constant is usually determined experimental ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 208 7.7.4 Effect of temperature and pressure on gas solubility Effect of temperature Temper ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 209 In relation (7.49),VT(g)st=n 2 RTst/p 2. More often we may encounter the form α= Vstpst ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 210 Solution It follows from the specification thatV 2 (g)= 1dm^3 andV 1 (`)= 1dm^3. Substi ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 211 T s (^0) x 1 (l^1 ) x(l 12 ) 1 (l 1 ) + (l 2 ) K Obr.7.9:Isobaric diagram of a two-comp ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 212 7.8.1 Conditions of equilibrium at constant temperature and pressure The intensive crit ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 213 Note: In the case of a heterogeneous azeotrope, the composition of the vapour phase is ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 214 s s A B C C 1 E F D Obr.7.10:Isobaric-isothermal diagram of three component system. Thi ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 215 can write the following formula for the residual amountnr nr=n 0 −np=n 0 ( V 1 V 1 +Kc, ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 216 7.9 Liquid-solid equilibrium in mixtures. This section deals with relations between the ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 217 For integration we need to know the temperature dependence of the enthalpy of melting o ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 218 (l) (s 2 )+(l) (l)+(s 1 ) E (s 2 )+(s 1 ) 0 x 1 1 T Tf2 Tf1 Obr. 7.11: Dependence of th ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 219 whereTis the melting temperature of a dilute solution,Tf, 1 is the melting temperature ...

CHAP. 7: PHASE EQUILIBRIA [CONTENTS] 220 c T T Tf2 Tf2 Tf1 Tf1 (l) (l) (s) (s) > (s)+(l) (^9) z (s)+(l) 0 x 1 1 0 x 1 1 a) b) ...