Logout Open In App
Open In App
Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Chapter 11: Q11.1-7E (page 645)

Heat is released when some solutions form; heat is absorbed when other solutions form. Provide a molecular explanation for the difference between these two types of spontaneous processes.

Short Answer

Expert verified

Heat is released when the total intermolecular forces (IMFs) between the solute and solvent molecules are stronger than the total IMFs in the pure solute and the pure solvent.

Step by step solution

01

Spontaneous Process

A spontaneous process is a process that occurs without the input of matter or electrical energy into the system. A spontaneous process in a completely isolated system is characterized by an increase in entropy.

02

Heat is released when solution formed

Heat is released when the total intermolecular forces (IMFs) between the solute and solvent molecules are stronger than the total IMFs in the pure solute and the pure solvent: Breaking weaker IMFs and forming stronger IMFs releases heat.

03

Heat is absorbed when solution formed

Heat is absorbed when the total Intermolecular forces between the solute and the solvent are weaker than the total of those in the pure solute and the pure solvent: Breaking stronger IMFs and forming weaker IMFs absorbs heat.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

A sample of\({\bf{HgCl}}2\)weighing 9.41 g is dissolved in 32.75 g of ethanol,\({\bf{C}}2{\bf{H}}5{\bf{OH}}\)(\({\bf{Kb}}\)= 1.20 °C/m). The boiling point elevation of the solution is 1.27 °C. Is\({\bf{HgC}}{{\bf{l}}_{\bf{2}}}\)an electrolyte in ethanol? Show your calculations.

Explain the cleansing action of soap.

What is the molality of phosphoric acid, \({{\bf{H}}_{\bf{3}}}{\bf{P}}{{\bf{O}}_{\bf{4}}}\), in a solution of 14.5 g of \({{\bf{H}}_{\bf{3}}}{\bf{P}}{{\bf{O}}_{\bf{4}}}\)in 125 g of water?

  1. Outline the steps necessary to answer the question.
  2. Answer the question.

What is the boiling point of the antifreeze 17.9m Ethylene Glycol?

A sample of Sulfur weighing 0.210 g was dissolved in 17.8 g of Carbon disulfide,\({\bf{C}}{{\bf{S}}_2}\)(\({{\bf{K}}_b}\)= 2.43 °C/m). If the boiling point elevation was 0.107 °C, what is the formula of a Sulfur molecule in Carbon disulfide?
See all solutions

Recommended explanations on Chemistry Textbooks

Chemical Reactions

Read Explanation

Chemical Analysis

Read Explanation

Organic Chemistry

Read Explanation

Physical Chemistry

Read Explanation

The Earths Atmosphere

Read Explanation

Ionic and Molecular Compounds

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free