The derivation of Gibbs energy of mixing (eqn 6.12) involves the mole fractions of two components A and B in an ideal solution, xA and xB, respectively and the total amount, n. Following the method used in Derivation 6.3. The initial Gibbs energy of the unmixed components is Gi = nAµA* + nBµB*; after mixing,  the chemical potentials in eqn 6.11:  μA = μAϴ + RTlnxA are used. Use this equation to calculate the Gibbs energy of mixing of 0.5 mole A and 0.9 mole B at 300 K. ΔG = ____________ kJ. 4 sig. fig. normal format. R = 8.3145 J/Kmol.

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Basic Chemical Calculations (Process and Variables)

A basic chemical calculation involves the application of the law of chemical proportions to various reactions and material and energy balance calculations on various chemical processes. Basic chemical calculation helps students analyze various chemical processes and develop problem-solving skills. The chemical manufacturing processes are divided into unit operations involving physical changes of material and unit processes involving the chemical transformation of materials. For instance, fluid flow, heat transfer, and mass transfer are unit operations, and oxidation, reduction, and pyrolysis are unit processes.