Assignment 4-answers - Assignment 4 answers 1 Which...

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Assignment 4- answers 1. Which molecule has the largest dipole moment? A. B. C. D. D will have the largest dipole moment- dipole moment is a vector quantity 2. Which compound has the highest boiling point? CH 4 , CH 3 OH , CH 3 CH 3 Which compound has the lowest boiling point? CH 4 , CH 3 OH, CH 3 CH 3 3. Arrange the following compounds in order from the lowest melting point to the highest melting point: CaO, dimond, H 2 O, CHCl 3 , C 2 H 6 , He He< C 2 H 6 < CHCl 3 < H 2 O < K 2 O < CaO < dimond 4. Arrange the following substances in the order of increasing volatility. Explain your answer. CH 4, CBr 4, CH 2 Cl 2, CH 3 Cl, CHBr 3, CH 2 Br 2 CBr 4 <CHBr 3 <CH 2 Br 2 <CH 2 Cl 2 <CH 3 Cl<CH 4
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All of these molecules are either non polar or have very little polarity. Therefore the intermolecular forces present are London forces which increase with molecular weight. The greater the molecular weight, the greater the intermolecular forces and lower the volatility 5. It took 4.5 minutes for 1.0 L helium to effuse through a porous barrier. How long will it take
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