What is the ideal gas constant for mmHg?
The constant R is called the ideal gas law constant. Its value depends on the units used to express pressure and volume….Learning Objectives.
| Numerical Value | Units |
|---|---|
| 62.36 | L·torr/mol·K = L·mmHg/mol·K |
| 8.314 | J/mol·K |
Can you use mmHg in PV nRT?
Since PV= nRT, so R = PV/nT or we can say R equals (pressure × volume) / (amount of gas × temperature). We know that temperature can be in Celcuius , Fahrenheit and Kelvin. For pressure we use units like atm, kPa and mmHg (torr).
At what pressure is R134A liquid?
The pressure of R134A at 1.7 °Celsius is 30.4 psig and is highlighted in the chart.
What is the specific volume of R134A?
Thermodynamic Properties of Superheated Refrigerant R134a
| P=60 kPa (Tsat -36.9°C) | P=100 kPa (Tsat -26.4°C) | |
|---|---|---|
| Temperature | Volume | Volume |
| 30 | 0.4071 | 0.2423 |
| 40 | 0.4210 | 0.2509 |
| 50 | 0.4350 | 0.2594 |
How do you convert gas constants?
In the SI system the most common units are J/kg K. Unit conversion: 1 J/kg K = 5.97994 ft lb/slug °R, and 1 ft lb/slug °R = 0.167226 J/kg K….The Individual Gas Constant – R.
| Gas | Name | Acetylene |
|---|---|---|
| Molecular Weight | [g/mol], [kg/kmol] | 26.038 |
| Individual Gas Constant – R | [J/kg K] | 319.32 |
| [kJ/kg K] | 0.3193 |
What is the full meaning of mmHg?
millimetre(s) of mercury
mmHg. abbreviation for. millimetre(s) of mercury (a unit of pressure equal to the pressure that can support a column of mercury 1 millimetre high)
What is normal pressure for car AC?
The low-side should be near 30 PSI at 90 degrees Fahrenheit or less. Pressure that is too much lower or higher shows there is a problem. On a properly working system, high-side pressure will be about twice the ambient temperature, plus 50 PSI.
What is R-134a gas?
1,1,1,2-Tetrafluoroethane – R-134a – is an inert gas used primarily as a high-temperature refrigerant for domestic refrigeration and automobile air conditioners. Engineering ToolBox – SketchUp Extension – Online 3D modeling!
Is R-134a refrigerant being phased out?
Most car manufacturers have switched to the alternative HFO refrigerant known as 1234yf. The plan for the United States was to phase out 134a on new vehicles by the year 2021, but this regulation was delayed due to Federal court rulings. Don’t let this fool you though. R-134a is ending and ending soon even here in the United States.
What should the low side pressure be on a R134a battery?
The charts on the back of R134a recharge kits that are available in auto parts stores indicate a car’s low side pressure should be, for instance, 45-55 psi when the outside ambient temp is 85degF. To me, those kits’ charts seem incorrect since R134a is almost 58 degF at 55 psi.
How much does an R-134a container weigh?
R-134a can come in a variety of container sizes. The most common that we see today are your one to two pound cans or your standard thirty pound light-blue cylinder. In order to understand the full history of R-134a we first have to look at it’s predecessor.