Choosing the Right Reid Vapor Pressure for Compressed Gases

What is the Reid Vapor Pressure of a compressed gas with an absolute pressure less than kPa at °C?

A) 275 kPa, 37.8 °C
B) 300 kPa, 36.9 °C
C) 175 kPa, 37.8 °C
D) 400 kPa, 40.0 °C

Answer:

The correct answer is C) 175 kPa, 37.8 °C.

The question aims to find the Reid Vapor Pressure of a compressed gas meeting specific temperature conditions from the provided choices. To make the right selection, it is essential to understand the relationship between vapor pressure and temperature, as well as typical values for gases under such conditions.

Reid Vapor Pressure (RVP) signifies a liquid's evaporation tendency under set parameters. In this case, we are tasked with identifying the RVP for a compressed gas at given temperatures. While the options don't directly state the RVP, they do offer pressure and temperature combinations to consider.

From the choices provided, the correct response should align with known gas behavior and typical RVP values. As temperature rises, vapor pressure tends to increase. Therefore, selecting an option that reflects this trend is crucial. Option C) 175 kPa at 37.8 °C stands out as a reasonable RVP for a compressed gas under the specified conditions.

Understanding the principles behind vapor pressure, the impact of temperature on gas behavior, and common RVP values aids in making an informed decision. It's essential to consider the characteristics of compressed gases and how they respond to varying temperatures when determining the correct Reid Vapor Pressure.