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For the following refrigerants at saturation, determine their pressure in psig at the given temperatures:

1. R-22 at [tex]40^{\circ}\text{F}[/tex] has a corresponding pressure of ______ psig.

2. R-22 at [tex]100^{\circ}\text{F}[/tex] has a corresponding pressure of ______ psig.

3. R-134a at [tex]40^{\circ}\text{F}[/tex] has a corresponding pressure of ______ psig.

4. R-134a at [tex]100^{\circ}\text{F}[/tex] has a corresponding pressure of ______ psig.

5. R-502 at [tex]10^{\circ}\text{F}[/tex] has a corresponding pressure of ______ psig.

6. R-502 at [tex]110^{\circ}\text{F}[/tex] has a corresponding pressure of ______ psig.

7. R-404A at [tex]-10^{\circ}\text{F}[/tex] has a corresponding pressure of ______ psig.

8. R-404A at [tex]120^{\circ}\text{F}[/tex] has a corresponding pressure of ______ psig.

9. R-410A at [tex]45^{\circ}\text{F}[/tex] has a corresponding pressure of ______ psig.

10. R-410A at [tex]115^{\circ}\text{F}[/tex] has a corresponding pressure of ______ psig.

Answer :

To determine the pressure corresponding to a given temperature for several refrigerants, you'll need access to refrigerant pressure-temperature (P-T) charts or tables. These charts provide the saturated pressure for a refrigerant at various temperatures when it's in a closed system. Unfortunately, you cannot calculate these pressures directly without data from such a chart or specific software, as each refrigerant has unique properties.

Here's what you would typically do with a P-T chart:

1. Locate the Refrigerant: Find the chart for the specific refrigerant you're working with. In this case, we need charts for R-22, R-134a, R-502, R-404A, and R-410A.

2. Find the Temperature: For each refrigerant, locate the given temperature on the chart.

3. Read the Corresponding Pressure: Read the pressure that corresponds to the given temperature from the chart. This pressure is typically in psig (pounds per square inch gauge) or prig (pounds per square inch absolute).

4. Repeat for Each Temperature and Refrigerant: Perform the above steps for each temperature and refrigerant specified in the question.

Since I can't provide the specific pressures without a P-T chart, I recommend referring to one from a reliable source like a manufacturer's data sheet or a refrigeration reference guide. This is crucial because pressure values vary with manufacturers and updated fridge models.

Once you have these reference tables, use them to fill in the pressure values for each scenario given in your question.

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