Chemistry ahwriter Chemistry2011-08-27T05:17:06+00:00 › Forums › Assignment Help › Chemistry Tagged: Chemistry Assignment Help, Chemistry Homework Help This topic contains 3 replies, has 3 voices, and was last updated by ahtutor 9 years, 1 month ago. Viewing 4 posts - 1 through 4 (of 4 total) Author Posts August 27, 2011 at 5:17 am #29 ahwriterParticipant The vapour pressure of deliquescent substance is less or more than that of water vapours in air ? August 27, 2011 at 5:19 am #8580 TylerParticipant Less than that of water vapours in air. August 27, 2011 at 5:22 am #8582 ahtutorParticipant vapour pressure of a deliquescent substance is less than that of the water vapour in air because these substances absorb water vapor and thus reduce its vapor pressure. Please look at the below table Systematic name Water vapor Liquid State water Solid state ice Properties Molecular formula H2O Molar mass 18.01528(33) g/mol Melting point 0 Â°C (273 K) Boiling point 99.98 Â°C (373.13 K) specific gas constant 461.5 J/(kgÂ·K) Heat of vaporization 2.27 MJ/kg specific heat capacity at constant pressure 1.84 kJ/(kgÂ·K) August 27, 2011 at 5:24 am #8583 ahtutorParticipant For more please look at this page. http://en.wikipedia.org/wiki/Water_vapor Author Posts Viewing 4 posts - 1 through 4 (of 4 total) You must be logged in to reply to this topic.