Question

6:07 1+ Exit Quiz Instructions Question 1 3 pts When molecules having significantly different sizes and interactions are mixed together, which of the following is(are) true? (a) It will generate heat of mixing (b) The local composition will be different from global composition (c) Excess Gibbs free energy will be zero (d) Activity coefficients will be 1.0 (a), (b), (c) (a), (c) (a), (b) (c), (d) Question 2 3 pts When an activity model is needed to deal with the destgmordquirextraction

Answer 1

Since, the molecules having different interactions are mixed. So, it will form non-ideal mixture because the ideal solution is the one which is having same interaction between the molecules.

For non- ideal mixture, activity coefficient can never be 1 and also gibbs free energy can never zero. Non-ideality is represented by activity coefficient, thus it can never be 1.

When the molecules of different shape and interactions are mixed then it generates heat of mixing and local composition can be different from global composition.

So, (a) and (b) are correct which means option (3) that is (a),(b) is the right answer.