9.85 (a)


Moderators: Chem_Mod, Chem_Admin

Andy Liao 1B
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am

9.85 (a)

Postby Andy Liao 1B » Fri Feb 09, 2018 8:47 pm

9.85 Potassium nitrate dissolves readily in water, and its enthalpy of solution is +34.9 kJ.mol-1. (a) Does the enthalpy of solution favor the dissolving process? (b) Is the entropy change of the system likely to be positive or negative when the salt dissolves? (c) Is the entropy change of the system primarily a result of changes in positional disorder or thermal disorder? (d) Is the entropy change of the surroundings primarily a result of changes in positional disorder or thermal disorder? (e) What is the driving force for the dissolution of KNO3?

I understand every part but part (a). The answer is that the change in enthalpy does not favor the dissolution process. Can someone please explain to me why this is true?

Ammar Amjad 1L
Posts: 54
Joined: Thu Jul 27, 2017 3:00 am
Been upvoted: 1 time

Re: 9.85 (a)

Postby Ammar Amjad 1L » Fri Feb 09, 2018 10:01 pm

Here's a link to a previous post that answers your question

viewtopic.php?f=135&t=10424&p=25838&hilit


Return to “Concepts & Calculations Using Second Law of Thermodynamics”

Who is online

Users browsing this forum: No registered users and 1 guest