Calculate the entropy, Physics

Assignment Help:

1. Sodium dodecyl sulfate is a detergent with a charged hydrophilic sulfate head group and a 12 carbon hydrocarbon tail.  In solid form it exists as a monomeric molecule but upon dissolving in water at room temperature (298 K) it assembles spontaneously (ΔG = -16.4 kJ/mol) into a higher ordered micelle with the structure shown below.

2290_Create a simple static web page3.png

A. Measurements of this process at room temperature show an enthalpy of micelle formation (ΔH) of -1.42 kJ/mol.  Calculate the entropy for this reaction.  Is micelle formation accompanied by an increase or decrease in the disorder of the system?  Explain your answer.

B. Micelle formation is a good example of what type of noncovalent interaction?

C. Micelle formation in the presence of 0.5 M NaCl results in a more negative ΔH value of -8.49 kJ/mol with no further change in entropy compared to micelle formation in water.  Is micelle formation more energetically favored in water or 0.5 M NaCl?  What noncovalent interaction could account for this change in enthalpy?


Related Discussions:- Calculate the entropy

Interference, if in an interference pattern,the ratio between maximum and m...

if in an interference pattern,the ratio between maximum and minimum intensities is 36:1,find the ratio between the amplitude and intensities of the two interfering waves.

Write down the condition for dispersion without deviation, Write down the c...

Write down the condition for dispersion without deviation. Describe power of a lens. What do you mean by magnification?

2d representation of the diamond unit cell, 2D representation of the diamon...

2D representation of the diamond unit cell In a 2D projection of the diamond unit cell, the base plane of the unit cell ABCD is shown by a square and the atoms in the base pla

Derive lorentz transformation equations, (a) State the postulate of STR and...

(a) State the postulate of STR and deduce Lorentz Transformation. OR Give basic postulate of special theory of relativity. Derive Lorentz Transformation equations. (b) Pro

Physics project, I want a physics project working model on magnet.

I want a physics project working model on magnet.

How fast are the electrons moving - magnetic field, Electrons travelling at...

Electrons travelling at right angles to a magnetic field experience a force of  8.3 x 10 -13 N when they are in a magnetic field of 6.2 x 10 -1 T. How fast are the electrons

Determine the net force, Q. While rummaging in her backpack for her cell p...

Q. While rummaging in her backpack for her cell phone, Sally's Mini-Cooper rear ends Joey's Suburban. Sally's car is totaled while the suburban is fine. If Sally's car hit the sub

What is the magnitude of the component, A 105-N suitcase sits on a rubber r...

A 105-N suitcase sits on a rubber ramp at an airport carousel at a 25° angle. The weight vector can be broken into two perpendicular components. a. What is the magnitude of the

How many types of fibers end are there, How many types of fibers end are th...

How many types of fibers end are there? Basically there are two types of fibers end are: adhesive encapsulated and state of the art fused, though some manufactures dispense alo

Project work, write a note on pascal discovry in helping to make hydrolic j...

write a note on pascal discovry in helping to make hydrolic jacks

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd