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

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance