QUIZ+1+-+key

QUIZ+1+-+key - CHEM 5lB M. Taagepera PRACTICE QUIZ 1...

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CHEM 5lB PRACTICE QUIZ 1 WINTER’08 M. Taagepera Ch.10 - Alkenes: Structure, Nomenclature, Reactions and Thermodynamics 1. STRUCTURE / REACTIVITY Compare the physical and chemical properties of alkyl halides and alkenes. Ex: C H H H Br ! ! H H H H (CH 3 Br, MW = 95 g/mole) (C 2 H 4 , MW = 28 g/mole) a) Structure Designate polarized bonds (imbalance in charge) with δ + and δ - . b) Properties (1) Physical (a) Predict state at room temperature (compare MW and intermolecular attractions). (Butane (MW= 58) is the highest MW alkane that is a gas at room temperature.) methyl bromide: ___ liquid ___ ethylene ___ gas ____ EXPLAIN Bromomethane has a much higher molecular weight than butane so it must be a liquid. Ethylene has a much molecular lower weight than butane and has only weak Van der Waals Intermolecular attractions so it must be a gas. (b) Which compound would be more soluble in water? ___ bromomethane ____ What is the intermolecular attraction? _ Van der_Waals and dipole-dipole
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QUIZ+1+-+key - CHEM 5lB M. Taagepera PRACTICE QUIZ 1...

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