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- 2. Plot the force of attraction as a function of distance between the K cation and O anion in a K"-O-K* molecule. Find the value of the force at a distance of 1.5nm between K*-O- , assuming linear arrangement.The electric dipole moment of methyl benzene (toluene) is0.40 D. (a) Estimatethedipolemomentsofthethreedimethylbenzenes (xylenes). (b) Also estimate the dipole moments of (i) 1.2.3-trimethylbenzene, Ii i) 1 ,2.4-trimethylbenzene. and (ii i) 1 ,3,5-trimethylbenzene. (c) Which of the values can you be sure about?In detail outline the phenomenon and the cause of phase transitions in polymer systems.
- The coordinates of the atoms of an ethanoic acid dimer are set out in more detail as shown. Consider only the Coulombic interactions between the partial charges indicated by the dashed lines and their symmetry-related equivalents. At what distance R does the attraction become attractive?Discuss in own words extended chain and end-to-end distance for a polymer. In terms of phase diagrams, discuss and explain UCST, LCST, binodal lines, spinodal lines, and the two main mechanism of phase separation in a macromolecular solution. What differs an amorphous polymer from a crystalline one?Please see part b as well, thank you
- Ethanoic acid vapour contains a proportion of planar. hydrogen-bonded dimers . The apparent dipole moment of molecules in pure gaseous acetic acid increases with increas ing temperature. Suggest an interpretation of the latter observation.(iv) Show the symmetry operations for all the symmetry elements present, and determine the transformation matrices by choosing the basis set as (a) all the atoms in A (b) CO groups in C molecules. NH2 CI H CI Со. ''CO OC CI H. 'N' NH2 CO A BCompute for the isoelectric point of L-M-L-P-D-T. upload a word file showing your solutions.
- Phenylalan ine (Phe. 1) is a naturally occurring amino acid with a benzene ring. What is the energy of interaction between its benzene ring and the electric dipole moment of a neighbouring peptide group? Take the distance between the groups as 4.0 nm and treat the benzene ring as benzene itself. Take the dipole moment of the peptide group as 2. 7 D.How much energy is due to the additional steric strain of the 1,3-diaxial interaction?Ch.2 Q.)3 USE IMAGE AS REFERENCE