PHYSICAL CHEMISTRY IN BRIEF

CHAP. 1: BASIC TERMS [CONTENTS] 41 U Main unit: mol kg−^1. This quantity is used mainly in connection with aqueous solutions of ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 42 Chapter 2 State behaviour The temperature, pressure, volume and amount of a pure substanc ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 43 2.1 Major terms, quantities and symbols 2.1.1 Molar volumeVmand amount-of-substance (or a ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 44 Molar and specific volumes and densities may be mutually converted using the relations Vm ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 45 Note:The critical volume is themolar volumeat the critical point, with the subscriptm usu ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 46 Obr.2.1:Dependence of pressure on the molar volume at a fixed temperature. The curves den ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 47 Solution From (2.15) it follows thatVm=RT /pand αp= p RT R p = 1 T 2.1.7 Coefficient of i ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 48 2.2 Equations of state. 2.2.1 Concept of the equation of state. The term equation of stat ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 49 Vm= const, [p, T]. (2.18) S Symbols:The symbol [X, Y,.. .] denotes that the equation appl ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 50 2.2.5 Pressure virial expansion The pressure virial expansion is an equation of state in ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 51 2.2.6 Van der Waals equation of state p = nRT V−nb −a ( n V ) 2 = RT Vm−b − a Vm^2 , z = ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 52 Solution We first estimate the constantsaandbfrom the specified critical quantities, usin ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 53 Note:The constants of the Redlich-Kwong’s equation of state are not identical with the id ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 54 states may be also applied in such a way that the sought for compressibility factorzA of ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 55 Virial expansion(2.19)—This is a theoretically grounded equation of state, which means t ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 56 2.3 State behaviour of liquids and solids The above equations of state offer little accur ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 57 Note:This equation is suitable for estimating the temperature dependence of the molar vol ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 58 2.4 State behaviour of mixtures We may estimate the state behaviour of gaseous mixtures b ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 59 2.4.2 Amagat’s law According to Amagat’s law, the volumeV, the molar volumeVmand the comp ...

CHAP. 2: STATE BEHAVIOUR [CONTENTS] 60 2.4.3 Ideal mixture A mixture that obeys Amagat’s law at all temperatures and pressures i ...