Trans-oleic acid (18:1,D9) has a melting temperature of (44.5C) and cis-oleic acid (18:1,D9) has a melting point of (13.4C). Briefly explain the difference in melting points between the two.
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- Arrange the following acids in the increasing order of their solubility in water: p-ClC6H4COOH, CH3COOH, CH3(CH2)3COOH. Explain why their order became like that?7 Ethanoic acid has a melting point of 17 °C, ethanamide has a melting point of 81 °C, and ethanal has a melting point of -125 °C. Rationalize the differences in melting point between these three compounds.9. An organic compound, P, has the molecular formula, C3H6O. It reacts with chromic acid to form Q. Q reacts with ethanol in the presence of concentrated sulphuric acid to give a sweet-smelling liquid, R. a) Identify P, Q and R. b) Arrange in decreasing order the boiling point of compound P, Q and ethanol. Explain. c) Compare acidity of Q and propanol
- Why are the predominant IMFs in CH3(CH2)8OH dispersion forces and not hydrogen bonding?Three samples labelled A,B, and C possess identical melting points: 99 degrees. When a 75/25 mixture of A and B is prepared, it’s melting point is 90-95 degrees. The melting point of a 50/50 mixture of A and C is 79-91 degrees. The melting point of a 25/75 mixture of B and C is 97-98 degrees. What information does this tell you about the identity of the 3 compounds? What would you expect an an approximate melting range for a 75/25 mixture of B and C?antaneous attractions than ethane, cloud and more surface area available for (C) Heptane's longer chain with more C-H bonds has more opportunities for hydrogen bonding to form than ethane. (D) Heptane has a carbon chain that is further apart making it less stable. 18. Which of the following would be expected to haye the lowest vapor pressure at 25°C? (A) N2 (B) Cl, (С) Br, (D) I, llame 19. In which of the following pairs of substances is the substance with the higher expected melting point listed first? (A) KCl or NaCl (B) Mg or Al (C) Ba or Cs (D) Ar or Kr boy 20. Which of the substances below would be expected to have the lowest boiling point at 1 atm pressure? (A) (bent) F-O-F (B) H-F m) KO O=0( (D) [Li*][CH] Combonue 21. Which factor(s) account for the observed difference in boiling points for the compounds below? Compound Ethane CH,CH3 Propane CH,CH,CH, Boiling point -89°C -42°C (A) stronger dipole-dipole attractions between propane molecules (B) a larger number of covalent bonds…
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- H. H H. H H. H H. Molar Mass: 106.12g/mol Molar mass: 122.12g/mol, Molar mass: 92.14g/mol A. What is/are the IMFA present in each of the substances? (LDF - London Dispersion Forces, DDF - Dipole-dipole Forces. HB Hydrogen Bonding)Consider the following triglyceride || CH, - O - C (CH2)16 - CH3 T CH - O - C (CH,), CH = CH (CH,), CH3 || | CH, - O - C (CH2), CH = CH (CH,), CH, At room temperature, would the above triglyceride be a liquid or solid? is because of the bond. ThisThe melting points and boiling points of two isomeric alkanes are asfollows: CH3(CH2)6CH3, mp = −57 °C and bp = 126 °C; (CH3)3CC(CH3)3,mp = 102 °C and bp = 106 °C. Explain why there is a small difference in the boiling points of the two compounds, but a huge difference in their melting points.