Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A polymer resist being stretched or compressed by restorring force f. The sign convention of f is such that positive f leads to stretching or increasing R. This force appears in the expression for the free energy of anideal polymer. dG =-SdT - fdR Where R is the end to end distance. In this problem you will compute this force as a function of R and temp T
A) derive the relationship (df/dT)R=(dS/dR)T (they are partial derivatives -maxwell equations with the R and T constant
B) for an ideal polymer. S(R)=const-R^2 /(2Na^2)+2ln(R/a) use this equation to evaluate (dS/dR) T constant
C) using your results from parts a and b find f as a function of T and R. You will have to integrate (df/dT)Rt in temperature. From 0 to T. Assume that f(T=0)=0
D) which term in the nswer for part c resists compression? Which term resists stretching?
E) sketch a graph of f(R) at three different temperatures. Does it require more or less force to stretch the polymer as the temp increases?
An experiment was performed to determine the Ksp of Ca(OH)_2_. A solution containing 2.00 x ^-2 M Ca(NO3)_2_ was saturated with Ca(OH)_2_ and filtered. Two samples of the saturated solution were titrated with 5.021x10^-2 M HCI, in order to determi..
assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts heat capacity(s) 37.7 jmolk
A solution made by dissolving 14.2 g of an unknown compound in 100.0 g of water has a freezing point of -0.771 °C. If the Kf for water is 1.86 °C/m
If I initially have a gas at a pressure of 12 atm a volume of 23 liters, and a temerature of 200k, and then I raise the temperature to 14 atm and increase the temperature to 300k, what is the new volume of the gas ?
Solid benzoic acid, C6H5COOH(s), is often used to determine the heat capacity of a bomb calorimeter, because the constant volume heat of combustion of this compound is known with high precision: qV = 26.434 kJ/g. When a 2.088 g sample of C6H5COOH(..
An electron is con?ned to a one-dimensional box of length L. It falls from the second energy level to the ground state, and releases a photon with a wavelength of 322 nm.
Calculate the molality of total ions in an acqeous solution prepared by dissolving 0.400 moles of magnesium chloride in 850.0 g of water?
how does a water softener work chemically? What's better to drink tap water or bottle springwater and why?
Calculate Qsp for calcium flouride (Ksp=3.9 x 10^-11) when 230.0 mL of a 0.00790 M solution of Ca(NO3)2 is added to 275.0 mL
A mixture of cyclopropane gas and oxygen is used as an anesthetic. Cyclopropane contains 85.7% C and 14.3% H by mass. At 50.0C and .984 atm pressure, 1.56 g cyclopropane has a volume of 1.00 L. What is the molecular formula of cyclopropane?
Calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400. g of water.
A neon sign is made of glass tubing whose inside diameter is 2.5 cm and whose length is 5.5 cm. If the sign contains neon at a pressure of 1.75 torr at 35o Celcius
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd