5. If we mix 0.3 mole of pure benzene with 0.7 mole of pure toluene at temperature T. Assume this mixture is an ideal solution. What is △Gmix?
(A) 0.7Rln0.3 + 0.3Rln0.7
(B) 0.7RTln0.3 + 0.3RTln0.7
(C) 0.3Rln0.3 + 0.7Rln0.7
(D) 0.7RTln0.7 +0.3RTln0.3

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