Mixture of different gases at different temperatures

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Homework Help Overview

The discussion revolves around determining the temperature of a mixture of two gases, specifically dry air and water steam, under varying conditions of pressure and mass. The original poster presents a scenario involving known temperatures, pressures, and masses for both gases, seeking guidance on the appropriate method to find the resulting temperature of the mixture.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster considers using a specific energy balance equation involving specific heats and temperatures, while also questioning the applicability of Dalton's law for partial pressures. Some participants inquire about the details of the process and the conditions of the chamber where the gases are mixed.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem. Clarifications regarding the chamber conditions and the nature of the gas flows have been raised, indicating a productive exchange of ideas without a clear consensus yet.

Contextual Notes

There is mention of a vacuum condition in the chamber, which later is corrected to indicate that the pressures are equal in the open chamber. This correction highlights the importance of accurately defining the system's constraints.

samak55
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Homework Statement


Hello. I have problém with this system. Mixture of two gases. How can i determine temperature T3?
Gas 1 (dry air) - I know T1, p1, m1
Gas 2 (water steam) - I know T2, p2, m2

Output (mixture) P3, (m1+m2); p3<p1;p3<p2

Homework Equations

The Attempt at a Solution


Is it possible to use this solution?
m1*c1*t1+m2*c2*t2=m1*c1'*t3+m2*c2'*t3
from the software tables
c1=function(p1;t1)
c1'=function(p3;t3)
c2=function(p2;t2)
c2'=function(p3;t3)​
?

Or i should use Daltons law to determine different partial pressure in c1' and c2'?

Excuse my English. I am working on it :)
 
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The answer depends on the details of the process that is employed.
 
This is a process in the steam turbine seals. There is one "tube" with air, second "tube" with steam and they both point into the chamber. In chamber is vacuum (vacuum is made by vacuum-pump)
 
You have two streams flowing into a closed chamber of fixed volume that is initially under zero absolute pressure?
 
Sorry my mistake. p1=p2=p3 chamber is opened.
 
samak55 said:
Sorry my mistake. p1=p2=p3 chamber is opened.
Please draw a schematic diagram.
 

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