A 0.5 m3 tank contains R134A at ambient temperature of 20 C. 10% of the tank volume is vapor and the balance is liquid. The tank safety valve opens at 1000 kPa. The room temperature gradually rises to 40 C and the tank is heated. The valve opens and the Freon is released until the valve closes (the pressure drops slightly below 1000 kPa. A - At what temperature of the Freon will the valve open? B - What will be the condition of the Freon when the valve closes? C-Determine the mass of Freon remaining in the tank. D- Determine the amount of heat transfer into the tank.

A 0.5 m3 tank contains R134A at ambient temperature of 20 C. 10% of the tank volume is vapor and the balance is liquid. The tank safety valve opens at 1000 kPa. The room temperature gradually rises to 40 C and the tank is heated. The valve opens and the Freon is released until the valve closes (the pressure drops slightly below 1000 kPa. A - At what temperature of the Freon will the valve open? B - What will be the condition of the Freon when the valve closes? C-Determine the mass of Freon remaining in the tank. D- Determine the amount of heat transfer into the tank.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

A 0.5 m3 tank contains R134A at ambient temperature of 20 C. 10% of the tank volume is vapor and the
balance is liquid. The tank safety valve opens at 1000 kPa. The room temperature gradually rises to 40 C
and the tank is heated. The valve opens and the Freon is released until the valve closes (the pressure
drops slightly below 1000 kPa.
A - At what temperature of the Freon will the valve open?
B - What will be the condition of the Freon when the valve closes?
C - Determine the mass of Freon remaining in the tank.
D- Determine the amount of heat transfer into the tank.

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