The article presents data on how different gases behave when they are in a mixture with a liquid at specific temperatures. The researchers studied the behavior of propane, n-butane, isobutane, and propylene/isopropyl fluoride systems at 30 and 50°C. They looked at how these gases interact with each other in a vapor-liquid equilibrium. The key findings show how these gases distribute between the vapor and liquid phases at the given temperatures, providing valuable information for various industrial processes.