Answer to Question #314359 in General Chemistry for christian

Question

arrange the following compounds (H2O, H2S,Br2,NaCl) in creasing

Answer 1

More will be molecular weight more will be its boiling point and less will be vapor pressure. NaCl has the highest boiling point so it has lowest vapor pressure. Br₂ has high molecular weight so high boiling point so low vapor pressure and H₂S has lower boiling point than Br₂ and so more vapor pressure. Whereas due to presence of boiling point of H₂O is higher than bromine and hydrogen sulphide due to hydrogen bonding.

So, order of vapor pressure is following

NaCl<H₂O<Br₂<H₂S