The density of R11 refrigerant changes significantly with temperature. As shown in the table, the density of liquid R11 increases as the temperature decreases, while the density of vapor R11 decreases as the temperature increases. For example, at 40°F (4°C), the density of liquid R11 is around 95 lb/ft³, while at 80°F (27°C), it is around 85 lb/ft³. Understanding these density changes is crucial for proper chiller design and operation.