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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...
Test the knowledge and understanding of the concepts and procedures for process instrumentation and communication systems used in process industries.
Adsorption and Membrane Processes
A 25.00-mL sample of hydrochloric acid solution requires 24.16 mL of 0.106 M sodium hydroxide for complete neutralization. What is the concentration of the original hydrochloric acid solution?
The limestone is supplied with average dimension 1.5 cm and must be reduced to 20 mesh before feeding to the gasification process. Recommend equipment to achieve the desired particle size and estimate the work required.
Latest commercial technologies, R&D in visbreaking with potential areas still need for improvement
Using the steam tables estimate cp in (kj/kg k) , for super heated steam and 0.1 Mpas and 700deg c
A mixture of maleic anhydride and benzoic acid containing 10 mol% acid is a product of the manufacture of phthalic anhydride.
An electron falls from the conduction band of silicon (Si) to the valence band. The band gap of Si is 1.1 eV. What is the wavelength of the photon emitted by this process? Give your answer in nm
A plant has a batch of 100 kmol of a liquid mixture containing 20 mol% benzene and 80 mol% chlorobenzene. It is desired to rectify this mixture at 1 atm to obtain bottoms containing only 0.1 mol% benzene. The relative volatility may be assumed con..
Chlorine has two isotopes 35Cl and 37 Cl, for the anion Cl- , of the isotope 37 Cl, specify the number of protons np ,number of electrons ne and numbers of neutrons nn
For the MgO-Al2O3 system, what is the maximum temperature that is possible without the formation of a liquid phase? At what composition or over what range of compositions will this maximum temperature be achieved?
Design a column for this separation. The column will operate at essentially atmospheric pressure. Use a reflux ratio 1.5 times the minimum.
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