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

What is incorrect with this picture, What is incorrect with this picture? ...

What is incorrect with this picture? Answer: The Current is the flow rate of charge. When the charge obtains to the junction of three wires (including the wire the

Surface tension, why does rain water boils faster than fresh water

why does rain water boils faster than fresh water

Brass, Brass: When copper is alloyed zinc (60% copper, 40% zinc) is called...

Brass: When copper is alloyed zinc (60% copper, 40% zinc) is called brass. It is widely used as a current carrying and structural material in switches and plugs etc. Propertie

Packing fraction in nuclear physics, what is the physical signification of ...

what is the physical signification of packing fraction in nuclear physics?

Semi conductor , how potential barrier is formed at the pn junction diode

how potential barrier is formed at the pn junction diode

Simple pendulum, what are the source of error in simple pendulum

what are the source of error in simple pendulum

All about bernoulli, write bernoulli,s equation using pressure,energy,and h...

write bernoulli,s equation using pressure,energy,and heads.

Ray optics, how do i start studying for this topic where should i start

how do i start studying for this topic where should i start

Interference pattern, Q.  Prove that for thin films, the interference patt...

Q.  Prove that for thin films, the interference pattern in reflected and transmitted light are complementary to each other. Also explain why the excessively thin films seen i

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