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Properties Of Solutions

by force
Tags: properties, solutions
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force
#1
Feb5-06, 05:36 PM
P: n/a
Who ever answers this is a genius.

The dissolution of gases in water is virtually always exothermic because __________.

a. one of the two endothermic steps (separation of solute particles) in the solution-formation process is unnecessary

b. the exothermic step in the solution-formation process is unnecessary

c. gases react exothermically with water

d. neither of the two endothermic steps in the solution-formation process is necessary

e. all three steps in the solution-formation process are exothermic
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mrjeffy321
#2
Feb5-06, 05:45 PM
Sci Advisor
P: 882
When dissolving a gas in a liquid, it is not necesary to expand the solute (the gas) in order to dissolve it, making the process need less input energy.
Also, at room temperature, water is already has a few "pockets" availible to dissolve a solute in, making it require even less energy.
force
#3
Feb6-06, 01:27 PM
P: n/a
in that case is d. correct ?

mrjeffy321
#4
Feb6-06, 03:36 PM
Sci Advisor
P: 882
Properties Of Solutions

I am reluctant to say that the second step is entitely unnecesary, I think it is just not as necesary. I think I am leaning towards a. as the answer.


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