In lithium bromide absorption refrigeration systems, which of the following is false?

In lithium bromide absorption refrigeration systems, the boiling point of water is indeed influenced by the pressure within the system. When the system is evacuated, the pressure is reduced, which in turn lowers the boiling point of water. This principle is crucial in refrigeration cycles, as it allows for effective heat absorption at lower temperatures.

Water vapor is absorbed by lithium bromide, which serves as an absorbent in these types of systems. This process allows for the refrigeration cycle to transfer heat away from the refrigerated space. Heat is also required to regenerate the lithium bromide solution, enabling the system to continue operating effectively by allowing the refrigerant to evaporate and cycle back to the absorber.

The mention of chemical pH influencing the efficiency of a lithium bromide system is not accurate. While pH can play a role in some chemical processes, it is not a primary consideration in the efficiency or functioning of lithium bromide absorption systems. These systems mainly rely on thermal dynamics and the properties of the working fluids involved rather than the manipulation of pH levels for operational effectiveness. Consequently, stating that chemical pH is used for efficiency in these systems is indeed false.