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

Inkjet printer, definition, Working principal, applications ??

definition, Working principal, applications ??

Find the resistance of copper wire , The specific resistance of copper is 1...

The specific resistance of copper is 1.7ohm. find the resistance of copper wire of length 10m and diameter 1mm. solution) R=ρ*l/A so ou have ρ,l and r(radius). you can use the f

Determine the current in the capacitor, A 25nF capacitor is connected in pa...

A 25nF capacitor is connected in parallel with a coil of resistance 2kΩ and inductance 0.20H across a 100V, 4 kHz supply. Determine (a) The current in the coil, (b) The cur

Light, does lights of different wavelengths help us to see different colour...

does lights of different wavelengths help us to see different colour

Explain the density - balanced forces, Explain the Density Density is a...

Explain the Density Density is a measure of how densely packed matter is.  One standard brick weighs more than the same size piece of Styrofoam but less than the same size bric

Does the path of the current induced to flow in the coil, A bar magnet is o...

A bar magnet is overhanging vertically above a closed coil of wire. The bar magnet is unconfined. It remainder vertical as it come near the coil falls straight through the coil and

A particle is projected vertically upwards, If a particle is projected vert...

If a particle is projected vertically upward in a constant gravitational field with an initial speed v 0 . If there is a retarding force proportional to the square of the instantan

Volume resistance and surface resistance, Volume resistance: The resistanc...

Volume resistance: The resistance provided to the current which flows through the material is called volume resistance. For a cube of unit dimensions this is called volume resisti

What are coherent sources, What are coherent sources? Why are coherent sour...

What are coherent sources? Why are coherent sources required to produce interference of light? Give an example of interference of light in everyday life. In Young's double slit exp

How can we increase current sensitivity of a galvanometer, Q. How can we in...

Q. How can we increase the current sensitivity of a galvanometer? The current sensitivity of a galvanometer is able to be increased by (i) Rising the number of turns (ii

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