1. Consider a cylindrical compressed-gas container (fully sealed) of length L, divided in half by a baffle (see figure). Left of the baffle is gas A and right of it is gas B. Assume they are at the same pressure and have the same concentration Co. The baffle is instantaneously removed at t = O and the two gases proceed to mix by diffusion. / Gas A Gas 8 x / 0 H: L Consider gas B only, its concentration C (moles/cma) is governed by: Ewe-C a: 6x2 where D is the diffusion coefficient. a) (4 marks) Complete the mathematical model by writing out the initial and boundary conditions. b) (10 marks) Solve for C(x,r) by the separation of variables. c) (5 marks) Draw a neat sketch of what you expect the graph of C06, 1:) versus x to look like, at t = O, t = 00, and at an intermediate time

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