Give Information on Van Laar Equation Model.
The van Laar equation is a thermodynamic activity model, which was developed by Johannes van Laar in 1910-1913, to describe phase equilibria of liquid mixtures. The equation was derived from the Van der Waals equation. The original van der Waals parameters didn't give good description of vapor-liquid equilibria of phases, which forced the user to fit the parameters to experimental results. Because of this, the model lost the connection to molecular properties, and therefore it has to be regarded as an empirical model to correlate experimental results.
Define Activity Coefficient.
An activity coefficient is a factor used in thermodynamics to account for deviations from ideal behaviour in a mixture of chemical substances. In an ideal mixture, the microscopic interactions between each pair of chemical species are the same (or macroscopically equivalent, the enthalpy change of solution and volume variation in mixing is zero) and, as a result, properties of the mixtures can be expressed directly in terms of simple concentrations or partial pressures of the substances present e.g. Raoult's law. Deviations from ideality are accommodated by modifying the concentration by an activity coefficient. Analogously, expressions involving gases can be adjusted for non-ideality by scaling partial pressures by a fugacity coefficient.
How to Calculate Activity Coefficient of Component 2 using Van Laar Equation?
Activity Coefficient of Component 2 using Van Laar Equation calculator uses Activity Coefficient of Component 2 = exp(Van Laar Equation Coefficient (A'21)*((1+((Van Laar Equation Coefficient (A'21)*Mole Fraction of Component 2 in Liquid Phase)/(Van Laar Equation Coefficient (A'12)*Mole Fraction of Component 1 in Liquid Phase)))^(-2))) to calculate the Activity Coefficient of Component 2, The Activity Coefficient of Component 2 using Van Laar Equation formula is defined as the function of van Laar coefficients A'12 and A'21 and the mole fraction of both components 1 and 2. Activity Coefficient of Component 2 is denoted by γ2 symbol.
How to calculate Activity Coefficient of Component 2 using Van Laar Equation using this online calculator? To use this online calculator for Activity Coefficient of Component 2 using Van Laar Equation, enter Van Laar Equation Coefficient (A'21) (A'21), Mole Fraction of Component 2 in Liquid Phase (x2), Van Laar Equation Coefficient (A'12) (A'12) & Mole Fraction of Component 1 in Liquid Phase (x1) and hit the calculate button. Here is how the Activity Coefficient of Component 2 using Van Laar Equation calculation can be explained with given input values -> 1.090538 = exp(0.59*((1+((0.59*0.6)/(0.55*0.4)))^(-2))).