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The binding of the hydrophobic amino acid tryptophan to a protein shows a pronounced hydrophobic effect. The thermodynamic data for the binding of is given below calculate ?
Cp; Calculate ?S and ?G at T=323K and 298K for this binding reaction assuming ?S=0 at T=287K Temp (K) ?H (kcal/mole) 298 -13.5 303 -15.5 313 -19 318 -21.5 323 -24 The protein lysozyme unfolds (melts) at 75.5C and at this equilibrium temperature the change in the enthalpy is 509kJ/mol. Calculate the change in the entropy at 75.5C Calculate the entropy change for unfolding lysozyme at 25C ( As with many other problems you have solved for finding thermodynamic property at an non-equilibrium temperature you need to assume the unfolding could occur at this temperature).
Given that the heat capacity of a dilute solution of lysozyme when folded is 21.2 kJ/Kmole and when unfolded it increases to 27.4kJ/K mole. Given that the unfolded protein exposes hydrophobic amino acids side chains to the water solvent explain the increase in the heat capacity based on the change in the structure of the solvent. A Carnot cycle uses 1 mole of an ideal gas as the working fluid. The initial conditions are P=4atm and T=400K. Step 1 is an isothermal expansion to P=1atm.
In step 2 the temperature is decreased to T=250K adiabatically. This is followed by an isothermal compression and then an adiabatic compression back to P=4atm and T=400K. Determine: q, w, ?U and ?S for each step and the overall cycle. Present the data in a table. Which values would change if instead step 2 was done first and then step1( in other words what values would change if first the temperature was changed from 400K to 250K and then the pressure changed from 4atm to 1 atm, but the overall cycle is still a Canot cycle). Comment on the reasons in one paragraph. Assume you have 1mole of liquid methane which you have held as the liquid while raising the temperature from -200°C to 0°C (note the warming of the liquid is not part of the...
Determine the minimum electric potential difference (in volts) that must be applied to accelerate an a-particle so that on interaction with a hydrogen atom, a ground state electron will be excited to n = 6
Construct a table that summarizes the Level 0 information that you have, and information that you might need to obtain. Comment on choices that might need to be reconsidered and why. Comment on what you will do about currently missing information.
Design a decanter for this duty, for a feed rate of 3500 kg/h. Concentrate on the separation of the water and aniline. The densities of water-aniline solutions are given in Appendix F, Problem F.8, available in the online material at booksite.Else..
Natural gas composed of 60. mol% methane, 30. mol% ethane, and 10. mol% propane at 25 °C and 500. psia is fed at a rate of 50. m3/hr into a boiler. In the boiler it is blended with enough air to provide 20% excess oxygen and combusted.
Calculate the equilibrium conversion, then redo parts (a) through (c) to achieve a concentration that is 90% of the calculated equilibrium conversion.
the equilibrium constant K for the reaction - what is the concentration of SO3 at equilibrium?
Make a rough estimate of the cost of steam per ton, produced from a packaged boiler. 10,000 kg per hour of steam are required at 15 bar. Natural gas will be used as the fuel, calorific value 39 MJ/m3 (roughly 1 MMBtu/1000 scf). Take the boiler eff..
Which do you think would be the greater health hazard: the release of a radioactive nuclide of Sr or a radioactive nuclide of Xe into the environment? Assume the amount of radioactivity is the same in each case.
Elaborate on the hierarchy of control measures used in Industrial Hygiene How would you calculate the noise problem at the factory and what control measures would you consider before you recommend the supply of hearing protection to personnel ex..
A 2014 Toyota Prius has a drag coefficient of Cd at road speed, using A m2 as the reference area. Determine the horsepower required to overcome drag at a velocity of v m/s. Calculate the answer if Cd= 0.26; A= 2.33m2 and v=30 m/s. Compare this fig..
One of the classical methods for the determination of the manganese content in steel is to convert all the manganese to the deeply colored permanganate ion and then to measure the absorption of light.
Explain in detail the working of the instrument. Description should include neat diagram, principle of working and the source of literature.
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