5.If we mix 0.4 mole of pure benzene with 0.6 mole of pure toluene at temperature T. Assume this mixture is an ideal solution. What is△S? (A)0.4RIn0.4 +0.6Rn0.6 (B) 0.4RTIn0.4 + 0.6RTIn0.6 (C) 0.4RIn0.6+0.6RIn0.4 (D) 0.4RTIn0.6+ 0.6RT1n0.4