Account for the following
N-ethylethanamine boils at 329.3K and butanamine boils at 350.8K, although both are isomeric in nature.

Explain the following : (a) Dimethyl ether has a lower boiling point (249K) than ethyl alcohol (351K) although both have same molecular masses. (b) Ethers have low solubility in water but high solubility in conc. H_(2)SO_(4) .

Arrange the following in increasing order of property specified: i. Aniline, ethanamine, 2-ethylethanamine (solubility in water) ii. Ethanoic acid, ethanamine, ethanol (boiling point) iii. Methanamine, N, N dimethylmethanamine and N- methylmethanamine (basic strength in aqueous phase)

Pure water boils at 373.15 K and nitric acid boils at 359.15 K . An azeotropic mixture of H_(2)O and HNO_(3) boils at 393.15 K . Distilling the azeotropic mixture will cause

A solution M is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0.9 Given: Freezing point depression constant of water (K_(f)^(water)=1.86 K kg mol^(-1)) Freezing point depression constant to ethanol (K_(f)^(ethanol))=2.0 K kg mol^(-1)) Boiling point elevation constant of water (K_(b)^(water))=0.52 K kg mol^(-1)) Boiling point elevation constant of ethanol (K_(b)^(ethanol))=1.2 K kg mol^(-1)) Standard freezing point of water = 273 K Standard freezing point of ethanol = 155.7 K Standard boiling point of water = 373 K Standard boiling point of ethanol = 351.5 K Vapour pressure of pure water = 32.8 mm Hg Vapour pressure of pure ethanol = 40 mm Hg Molecular weight of water = 18 g mol^(-1) Molecular weight of ethanol = 46 g mol^(-1) In anwering the following questions consider the solutions to be ideal dilute solutions and solutes to be non-volatile and non-dissociative. The freezing point of the solution M is

Account for the boiling points of 2-propanol, propanone and 2-methylpropene (the molecular masses approximately the same) are 355K, 330K and 266K respectively.