Question

Rank from decreasing to increasing the effect the functional groups have on the melting point of compound x:

-OH or -COOH

i think its COOH<OH because OH is easier to hydrogen bond?

Answer 1

R-COOH produces stronger H bonds than R-OH

Answer 2

For example, look up the boiling point of CH3CH2OH versus that of CH3COOH although some of the increase is due to the increased molar mass of the acid (46 for the alcohol versus 60 for the acid) but formic acid (HCOOH) has a molar mass of 46 (same as the alcohol) and the boiling point is higher than the alcohol.