Question

I-I bond distance in solid iodine is longer than in gaseous iodine.Justify.

Answer 1

Answer:

many forces are present in gassious phase of iod

ine like as inter molecular forces but in solid state there are only electrostatic forces of attraction between the atoms.

Answer 2

Answer:

In solid state of iodine intermolecular forces are stronger as compared to intermolecular forces in gaseous state. Look below:

I-I...I-I...I-I

When these dotted lines (intermolecular forces) are weaker in gases, iodine-iodine forces become strong and bond length is small.

BOND LENGTH: The distance between nuclei of two bonded atoms.

EXAMPLE: Consider two person holding the hands of each other(intramolecular forces) tightly and another two persons try to push them from opposite direction(intermolecular forces). If the intermolecular forces are stronger, intramolecular forces become weaker and distance between the person holding their hands increases(bond length increases) like in solid. If intermolecular forces are weaker , intramolecular forces would remain stronger and distance between the persons holding their hands decreases(bond length decreases) just like in gases.

Explanation: