If C_a C_b and a b, where a and b are x-coordinates, then A) The gradient of C is negative and diffusive flux is positive, going from a to b B) The gradient of C is positive and diffusive flux is negative, going from a to b C) The gradient of C is negative and diffusive flux is negative, going from b to a D) The gradient of C is positive and diffusive flux is negative, going from a to b. E) The gradient of C is negative and diffusive flux is positive, going from b to a.

Question

If C_a > C_b and a > b, where a and b are x-coordinates, then A) The gradient of C is negative and diffusive flux is positive, going from a to b B) The gradient of C is positive and diffusive flux is negative, going from a to b C) The gradient of C is negative and diffusive flux is negative, going from b to a D) The gradient of C is positive and diffusive flux is negative, going from a to b. E) The gradient of C is negative and diffusive flux is positive, going from b to a.

Quizplus · Accepted Answer

Given the condition C_a > C_b and a > b, it implies that the concentration at point a is less than at point b since a higher concentration would result in a higher value. This means the concentration decreases from b to a, indicating a positive gradient (concentration increases as you move from a to b). However, the diffusive flux, which moves from high to low concentration, is negative because it goes against the positive gradient direction (from b to a).

If Ca > Cb and a > B, Where a and B

If C_a > C_b and a > B, Where a and B