use energy balance for the solution

$4\mathrm{.}42$ A fluid at $8$ bar and $200C$ flows into a rigid tank of $1m^3$ volume

through a $10cm$ internal diameter pipe at an average velocity of $3\frac{m}{s}.$ The

tank is initially empty. After $30s,$ the temperature in the tank is recorded

as $200C$

a$)$ Calculate the pressure in the tank if the fluid is steam.

b$)$ Calculate the pressure in the tank if the fluid is air.

$($Answer: a$)5\mathrm{.}77$ bar, b$)5\mathrm{.}65$ bar$)$