In which of the following pure compounds would intermolecular hydrogen bonding be expected? Công ọ сненсн CH, отопривет сконсион ононенон сненон None of the Above
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- (a) In polyvinyl chloride shown in Table 12.6, whichbonds have the lowest average bond enthalpy? (b) When subjected to high pressure and heated, polyvinylchloride converts to diamond. During this transformationwhich bonds are most likely to break first? (c)Employing the values of average bond enthalpy in Table8.3, estimate the overall enthalpy change for convertingPVC to diamond.Но ОН H₂SO4 (conc.)In which of these substances is significant hydrogen bondingpossible: methylene chloride (CH2Cl2), phosphine(PH3), chloramine (NH2Cl), acetone (CH3COCH3)?
- The amount of saturation not only has an effect on the chemical but also the physical properties of the fat. For example, animal fat which is about half saturated and half unsaturated fat is a solid at room temperature but vegetable fat which is about 85 % unsaturated fat is a liquid at room temperature. This is because saturated fats are more linear compared to unsaturated which are nonlinear (bent), meaning that saturated fats are capable of more of what kind of interaction? Hydrogen bonding van der Waals Ionic bonding Covalent bondingWhich type of intermolecular forcedo the dotted lines in this figurerepresent?2S03(g) →2SO2(g) + O2(g); AH° =
- What physical concept forms the premise of VSERP theory?In which of the following pure substances would hydrogen bonding be expected? propanamide H pentane H- diethyl ether H 414 H H H H H H ||||| H H O All of the Above Н N- H H Н H Н Н HHHH Н Н Н H н -Hthe conditions that suitable and convert CO and H2 to methanol
- The above molecule may be further converted into a polymer with similar molecular structure to that of polyester. Describe the conditions of this process and write down the reaction for each step.Carbon-hydrogen bonds exhibit a range of different chemical reactivity that depends on molecular structure. Classify the C-H bonds at the carbons labeled a-c in the structure below.The table below shows some physical properties of halogenatedliquids.Which of the following statements best explains these data?(a) The larger the dipole moment, the stronger the intermolecularforces, and therefore the boiling point is lowest for themolecule with the largest dipole moment. (b) The dispersionforces increase from F to Cl to Br; since the boiling point alsoincreases in this order, the dispersion forces must make a fargreater contribution to intermolecular interactions thandipole–dipole interactions. (c) The trend in electronegativityis F 7 Cl 7 Br; therefore, the most ionic compound 1CH2F22has the lowest boiling point, and the most covalent compound1CH2Br22 has the highest boiling point. (d) Boiling point increaseswith molecular weight for these nonpolar compounds.