Help!!!!!!?

Question

Water, H2O, is less than half as heavy as Carbon Dioxide, CO2. Why then is the boiling point of water so much higher than that of carbon dioxide?

Answer 1

The boiling point of a substance depends not only on its mass but also on the intermolecular forces experienced by the molecules in the substance.

Water is a polar molecule with a partial positive charge on one side and a partial negative charge on the other. These charges interact to form weak bonds (hydrogen bonds) that hold the water molecules together and prevents individual molecules escaping from the mixture (boiling) as easily.

Carbon dioxide on the other hand is not polar and individual carbon dioxide molecules do not interact strongly.

Answer 2

Lancenigo di Villorba (TV), Italy

You wrote :"...H2O is less than half as heavy as CO2...".
Surely, you was referring to Molecular Weight, e.g. respectively 18 Da for Water and 44 Da for Carbon Dioxide.

FUNDAMENTs
Although you was thinking to Gravitational Force, the interactions influencing Boiling Points are other ones.
I refer to Secundary Chemical Bonds or Intermolecular Forces, e.g. the chemical interactions between one molecules and the other around the former one.
Boiling Point records the Temperature's Level where the Inner Energy of the Chemical Stuffs results able to BREAK THE INTERMOLECULAR FORCEs OPPOSITING TO MOLECULE's ESCAPE or VAPORIZATION.
THE GREATER INTERMOLECULAR FORCES, THE GREATER BOILING POINT.

CARBON DIOXIDE
CO2 is a LINEAR MOLECULE (e.g. Carbon Atom displaced as sp or Linear Ibridization) unable to Permanent Dipole : in this case, the Intermolecular Forces interested are mainly "Instantaneous Dipolar Forces".

WATER
H2O is a BENT MOLECULE (e.g. Oxygen Atom displaced as a Tetrahedron) where there are Hydrogen Atoms bound to a Very More Electronegative Other One ; the Oxygen/Hydrogen Bonds result Polar Covelent Ones because the Electronegative Difference ; the latter one shows Electron's Pairs : in this case, the Intermolecular Forces interested are mainly "Hydrogen Bonds" and "Permanent Dipolar Forces".

I hope this could be clear.

Answer 3

Carbon Dioxide is a gas. Can't really boil it.

Answer 4

Because CO2 is a completely linear symmetrical molecule, O=C=O, and water is shaped like a bomerang, O

Answer 5

The hydrogen bonding of water molecules require much more energy to break up than the CO2 bonds.

Answer 6

Because of the covalent bond.. i asked my dad who has a chemistry major

Answer 7

Sorry ! i came in for help but when i saw the actual question, i really don't know the science . so please Excuse Me . Thanks