$7$: Twenty kilomoles per hour of equimolar mixture of n$-$pentane $(1)$ and $2-$propanol $(2)$

at $50C$ and $200$kPa is directed to a flash distillation apparatus functioning at $50C$ and $75$kPa.

Assuming the validity of Raoult's Law, provide the following details:

Demonstrate that the mixture will undergo flashing in the flash distillation unit.

Present the flow rate and composition of the overhead $($vapor$)$ stream.

Provide the flow rate and composition of the bottoms $($liquid$)$ stream.

Additionally, identify the assumptions made during problem$-$solving that you consider the least

valid and justify your choice.