Following are 1H-NMR spectra for compounds G, H, and I, each with the molecularformula C5H12O. Each is a liquid at room temperature, is slightly soluble in water, andreacts with sodium metal with the evolution of a gas.(a) Propose structural formulas of compounds G, H, and I.(b) Explain why there are four lines between d 0.86 and 0.90 for compound G.(c) Explain why the 2H multiplets at d 1.5 and 3.5 for compound H are so complex.
Chapter – 4 Convective Mass Transfer 4.1 Introduction 4.2 Convective Mass Transfer coefficient 4.3 Significant parameters in convective mass transfer 4.4 The application of dimensional analysis to Mass Transfer 4.4.1 Transfer into a stream flowing under forced convection 4.4.2 Transfer into a phase whose motion is due to natural convection 4.5 Analogies among mass, heat, and momentum transfer 4.5.1 Reynolds analogy 4.5.2 Chilton – Colburn analogy 4.6 Convective mass transfer correlations 4.6.1 For flow around flat plat 4.6.2 For flow around single sphere 4.6.3 For flow around single cylinder 4.6.4 For flow through pipes 4.7 Mass transfer between phases 4.8 Simultaneous heat and mass transfer 4.8.1 Condensation of vapour on cold surface 4.8.2 Wet bulb thermometer 4.1 Introduction Our discussion of mass transfer in the previous chapter was limited to molecular diffusion, which is a process resulting from a concentration gradient. In system involving liquids or gases, however, it is very difficult to eliminate convection from the overall masstransfer process. Mass transfer by convection involves the transport of material between a boundary surface (such as solid or liquid surface) and a moving fluid or between two relatively immiscible, moving fluids. There are two different cases of convective mass transfer: 1. Mass transfer takes place only in a single phase either to or from a phase boundary, as in sublimation of naphthalene (solid form) into the moving air.
