The internal pressure of a cylinder with one ounce of liquid R-410A refrigerant which has been sitting in a 100 degree Fahrenheit truck is?

The internal pressure of the cylinder containing R-410A refrigerant would be approximately around 186 psi when sitting in a 100 degree Fahrenheit environment. This pressure value is based on the saturation pressure of R-410A at 100°F. Make sure to consult a pressure-temperature chart for accurate readings.