A standard Continuous Stirred Tank Reactor $($CSTR$),$ fitted with the Rushton Turbine, is containing water at $140C.$ The vessel diameter is $0\mathrm{.}3m$ and the impeller speed is $120rpm.$

i$)$ Find the specific power requirement.

$[10$ Marks$]$

ii$)$ Calculate the impeller speed, if the volume of the reactor increases by $64$ times and having the constant specific power.

$[10$ marks$]$

iii$)$ Explain the STR is adequate or not.

$[5$ Marks$]$I