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

Horizontal ray reflacted by prism, A horizontal ray hitting a prism with n=...

A horizontal ray hitting a prism with n=1.5, tip angle α=4 o . The ray will be deflected by an angle δ=(n-1)α. The ray is further reflected by a vertical mirror. Now, if I want to

When a semiconductor is doped with a p-type impurity, When a semiconductor ...

When a semiconductor is doped with a P-type impurity, each impurity atom will (A) Acquire negative charge.                        (B) Acquire positive charge. (C) Remain

How is a galvanometer converted into an ammeter, Q. How is a galvanometer c...

Q. How is a galvanometer converted into (a) an ammeter and (b) a voltmeter? A galvanometer is transformed into an ammeter by connecting a low resistance in parallel with it. Th

Buoyancy, Why do dead bodies float in water ?

Why do dead bodies float in water ?

Calculate the entropy change - ideal gas, 1. Calculate the entropy change w...

1. Calculate the entropy change when 1 kmol of an ideal gas at 300 K and 10 bar expands to a pressure of 1 bar if the temperature stays constant. 2. What is the change in entrop

Define self inductances and mutual inductances, a. Measure the force among ...

a. Measure the force among two linear, parallel, long conductors carrying currents in opposite direction. b. Measure self inductances and mutual inductances among two co-axial s

Use of magnesium alloys, Magnesium is the lightest of the structural metals...

Magnesium is the lightest of the structural metals.  While this low density is an attractive property, magnesium also has a high corrosion rate that has often been seen as a disadv

Find t in terms of d and v, An object that is moving in a straight line wit...

An object that is moving in a straight line with speed v covers a distance, d = vt, in time t. Rewrite the equation to find t in terms of d and v. How long does it take a plane tha

Caluclate the work done by machine, A certain machine exerts a force of 200...

A certain machine exerts a force of 200 Newton on a box whose masses 30 kilograms.  The machine moves the box a distance of 20 meters with a horizontal floor. What amount o

What is jason acceleration, Jason and his sister, Tara, are riding bicycle...

Jason and his sister, Tara, are riding bicycles. Jason tries to catch up to Tara, who has a10.0-s head start . a. What is Jason's acceleration? b. What is Tara's accele

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