G In an absorption refrigeration unit, a mixture of LiBr solution is pumped at a rate of 0.75 kg/s to the generator which is at a temperature of 80oC, while the condenser is at 35oC, the evaporator is at 15oC, and the absorber is at 25oC. What is the concentration of LiBr solution leaving the absorber

Explanation:

Pump rate of LiBr = 0.75kg

Temperature of the generator = 80

Temperature of evaporator = 15

Temperature of absorber = 25

Condenser = 35

Concentration of LiBr leaving the absorber = 0.75 × 25 = 18.75 /35 = 0.536

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8