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Lostsunrise [7]
2 years ago
5

If 31.8 grams of LiCl are dissolved in 225 grams of water, what is the concentration of the solution in percent by mass?

Chemistry
1 answer:
SVEN [57.7K]2 years ago
5 0
  <span>31.8/(31.8+225) *100 = 5.86% 


12 moles * 22.4 L/[email protected]= 26.9 L</span>
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To determine if the reaction will be spontaneous or not at this temperature, we need to calculate the Gibbs's energy using the following formula:

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Now, other factor we need to determine is the sign of the S variation. When talking about gases, the more moles you have in your system the more enthropic it is.

In this reaction you go from 7 moles to 8 moles of gas, so you can say that you are going from one enthropy to another higher than the first one. This results in: \Delta S>0[/tex}Back to this expression: [tex]\Delta G= -1267 - 473 K* \Delta S

If the variation of S is positive, the Gibbs's energy will be negative always and the reaction will be spontaneous.

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