a$)$ An open tubular wide bore GC column $0\mathrm{.}5$ mm in diameter is coated with a stationary phase which is $2$m thick. For a compound with k$=10,$ Dm$=1$ x $10-1$ cm$2/$sec in the gas phase and Ds $=1$ x $10-5$ cm$2/$sec in the stationary phase. $$ and q $=1.$ Using Excel, prepare a plot of plate height H versus linear velocity $)$ from $2$ cm$/$sec to $100$ cm$/$sec $($increments of $1$ to $10$ cm$/$sec$,$ then increments of $5$ to $40$ cm$/$sec$).$ Use the Cs$$ equation in problem $2.$ Use Cm$$k$\text{'}/(1+$ k$\text{'}$dc$2)()/$ Dm$.$

b$)$ Repeat this calculation and HETP$-$ plot with a $0\mathrm{.}1$ mm ID narrow bore GC column with a $0\mathrm{.}5$ micron stationary phase film thickness. Consider the other terms the same as on part a$).$