Question

A closed rigid tank contains water initially at 10,000 kPa and 520ºC and is cooled to a final temperature of 270° C. Determine the final pressure of the water.

Answer 1

Answer:

final pressure is 6847.41 kPa

Explanation:

given data:

$P_1 = 10,000 kPa$

$T_1 =520\ degree\ celcius = 793 K$

$T_2 = 270 degree celcius = 543 K$

as we can see all temperature are more than 100 degree, it mean this condition is refered to superheated stream

for ischoric process we know that

$\frac{P_1}{T_1} =\frac{P_2}{T_2}$

$\frac{10*10^6}{793} = \frac{P_2}{543}$

$P_2 = 6.84741*10^6 Pa$

final pressure is 6847.41 kPa