Solving Ideal Gas Problem Homework: Final Pressure of Tank w/ Vapor & Water

  • Thread starter Thread starter matt222
  • Start date Start date
  • Tags Tags
    Gas Ideal gas
AI Thread Summary
The discussion revolves around calculating the final pressure in a closed tank filled with water and vapor, given an initial pressure of 1 bar and a volume of 80,000 m³. The user initially calculated a final pressure of 0.167 bar but questioned this due to the fixed tank volume. They noted that as the volume increases, the pressure should decrease, leading to confusion about the calculations. The user later suggested that if the volume ratio is considered, the pressure could be 6 bar, seeking clarification on this point. The thread highlights the complexities of applying ideal gas laws in scenarios involving fixed volumes and multiple phases.
matt222
Messages
130
Reaction score
0

Homework Statement


Calculate the final pressure of the closed tank containing vaper if it is filled with a water.If the water mass is 400,000 kg is injected into the tank, initial tank pressure is 1bar and the volume is 80,000m^3, density of the vapor 1 kg/m^3 at 1 bar, treat the air and water as ideal gases.


Homework Equations





The Attempt at a Solution


Volume before V1=80,000m^3
Volume after V2=480,000m^3
initial pressure = 1 bar

final pressure is going to be 0.167 bar, but the question is asking me that with the same tank how much the pressure is going to be and in this case my answer is wrong!

as the volume increase it is normal that the pressure will decrease but if we have a fixed tank!

I really confused!
 
Physics news on Phys.org
I think something ring in my head!

Since the initial volume is before V1=80,000m^3
Volume after V2=480,000m^3

if we take the ratio of it V2/V1= 6 in this case the pressure for the same tank is going to be 6 bar! is it true
 
I need a help please
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Proof question related to the Ideal Gas Law
Replies
8
Views
2K
Energy of a water tank with compressed air
Replies
5
Views
1K
Trouble solving for end state of two control volumes in a rigid tank
Replies
12
Views
2K
Mixing two ideal gases with different V, T at constant pressure
Replies
16
Views
3K
Adiabatic Expansion of Pressurized Air in a Piston-Cylinder Setup
Replies
8
Views
2K
Ideal Gas Law and Pressure at 80°C
Replies
2
Views
3K
Solving Homework: Find Final State, Mass, Work & P-v Diagram
Replies
4
Views
1K
Pressure just before the exit hole in a draining tank
Replies
7
Views
2K
Pressure equalization between two tanks
Replies
20
Views
19K
Heat and work when temperature increases by 1 degree
Replies
21
Views
2K

Hot Threads

Recent Insights

Back
Top