An ionic compound has a very negative ∆H_soln in water (b) Which term would you expect to be the largest negative number: ∆H_solvent, ∆H_solute, or ∆H_mix?

Video transcript

hi everyone for this problem, it reads true or false for an ionic compound with a very negative change in entropy of solution in water. The change in entropy of solu has a greater magnitude than both. The change in entropy of solvent and change in entropy of mixture. Okay, so in order to visualize this problem, we need to know that the change in entropy of the solution is equal to the sum of the change in entropy of the solute plus the change in entropy of the solvent plus the change in entropy of mixing the solu and solvent particles. Okay, so looking at this, the change in entropy of solute and solvent are both positive because interrupting the inter molecular forces in the solute and solvent are both endo thermic processes. So for the change in entropy of the solution to be negative, that means the change in entropy of the mixture is also going to have to be negative so that its magnitude exceeds the magnitude of our change in entropy of the salyut plus solvent. So this statement is false. Okay, that's not going to be true because of what we just visualized. So that is the end of this problem. I hope this was helpful