4 Write word equations for the following chemical reactions.
(a) Octane gas is burnt with oxygen in a car engine
to produce carbon dioxide and water.
(b) Sodium metal reacts with chlorine gas to form
sodium chloride.
(c) Hydrogen gas and oxygen gas combine to form
water.
(d) Zinc metal dissolves in hydrochloric acid to
form hydrogen gas and zinc chloride.

A) 2 C8H18 + 25 O2 → 16 CO2 + 18 H2O

B) 2Na + cl2 -> 2Nacl

C) 2H2+02 -> 2H20

D) Zn + 2Hcl -> Zncl2 + H2

ch3 [ch2]14cooh

explanation:

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.