36% connect.ubc.ca O 28.3 24.9 24.3 O26.4 QUESTION 6 1 points Save Ans soInH for

Question

36% connect.ubc.ca O 28.3 24.9 24.3 O26.4 QUESTION 6 1 points Save Ans soInH for solid potassium perchlorate (KC04) is +51.04 k3mol-1, when Ka04 is dissolved in water: O The solution gets COLD, because interactions between H20 and KCI04 are weaker than those in H20 and KCIO4 alone. The solution gets HOT, because interactions between H20 and KCIO4 are stronger than those in The solution gets HOT, because interactions between H20 and KCI04 are weaker than those in H20 and KCI04 alone. O The solution gets COLD, because interactions between H20 and KCI04 are stronger than thosein H20 and KCI04 alone. 1 points Save A QUESTION 7 For each region of the diagram below (A-E), match the statement that best describes the molecular scale explanation for the effe temperature when heat is absorbed by a sample of water. 200 150 2 100 E (100 to 200 C) D(at 100 C

Explanation / Answer

Since deltaHsolution is positive that means, heat is absorbed when the solute is dissolved , so temperature would decrease and the solution will get cold. And also, positive Hsolution means that the heat required to break the solute and solvent apart is greater than the heat released when the separated solute and solvent molecules combine., So interactions between H2O and KClO4 are weaker than those in H2O and KClO4 alone.

So, option A.

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.