give one use of metallic element in salt
Answers
The most popular working substance used is LiBr, and other types are LiCl and CaCl2 solutions. Similar to some metallic salt sσℓυтíσηs.
Answer:
Many metallic salt solutions, like LiBr, LiCl, LiI, LiNO3, CaCl2, ZnCl2, and KNO3, etc., are found to have strong adsorption behavior on water vapor; in other words, the corresponding saturated vapor partial pressure of the aqueous solutions of these types of substances is very low. For example, when the temperature and concentration (mass percentage) of an LiBr-H2O solution are 25°C and 50% respectively, the partial pressure of water vapor on the surface is about only 0.8 kPa, even lower than the saturated vapor partial pressure of water at 6°C. The saturated vapor pressure of water at 25°C is 3.16 kPa, which means the vapor on the water surface can still be absorbed by the LiBr solution. The lower the saturated vapor pressure for the solution is, the stronger it is to absorb water vapor. Owing to the abilities of the solutions absorbing the water vapor with a much lower temperature, they are first utilized in the areas such as air condition cooling and heat pumping and achieve great success. Currently, most of the large central air conditioners in commercial use are manufactured by those absorption-working substances. Those substances are environmentally friendly because they have many advantages, such as nontoxic, odorless, nonflammable, nonexplosive, and nonstaining for the environment, etc.
Although this kind of substance has the property that strongly absorbs water vapor, they will release water sufficiently when its temperature reaches a certain degree (this required energy in this process is mainly thermal energy).