Thermodynamics: property tables HELP

In summary, the problem involves determining the final volume of 1 kg of R-134a in a weighted piston cylinder device after it is heated from -26.4 C to 100 C. The initial specific volume and pressure can be found in the thermodynamic tables, and the final specific volume can be calculated using the same pressure and temperature.
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Thermodynamics: property tables HELP!

Homework Statement



1 kg of R-134a fills a 0.14m^3 weighted piston cylinder device at a temperature of -26.4C. The container is now heated until the temp is 100C.
Determine the final volume.


The Attempt at a Solution


So the boiling point is -26.1, so it is a saturated vapor to a superheated vapor?
the specific volume is .14m^3
Pressure is constant? Using a T-V graph?
I don't understand how to go about this problem any help would be great!
 
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  • #2
At -26.4 C, the initial specific volume is 0.14 m^3/kg. This point needs to be looked up in the thermodynamic tables for the initial pressure. Once the pressure is known, this is also the final pressure. Now, the tables need to be used again to find the specific volume at 100 C and the same pressure. This will be the new volume (since there is 1 kg).
 

1. What are thermodynamic property tables?

Thermodynamic property tables are a set of tables that contain numerical values of various thermodynamic properties, such as temperature, pressure, volume, entropy, and enthalpy. These tables are used to calculate and analyze the behavior of substances under different thermodynamic conditions.

2. How are thermodynamic property tables helpful?

Thermodynamic property tables are helpful because they provide a quick and convenient way to look up and compare thermodynamic properties of different substances. They also allow for easy calculations of thermodynamic processes, saving time and effort in complex calculations.

3. What type of information can be found in thermodynamic property tables?

Thermodynamic property tables typically include data for a specific substance, such as water or air, at different temperatures and pressures. They also provide information on specific thermodynamic properties, such as heat capacity, internal energy, and Gibbs free energy.

4. How are thermodynamic property tables constructed?

Thermodynamic property tables are constructed through experimental measurements and theoretical calculations. The data is then organized and tabulated in a way that allows for easy retrieval and usage. New tables are constantly updated and improved as new data becomes available.

5. Are there different types of thermodynamic property tables?

Yes, there are different types of thermodynamic property tables depending on the substance and the specific properties being considered. Some common types include saturation tables, steam tables, and air tables. There are also tables specifically designed for different applications, such as refrigeration or power generation.

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