The phase diagram below refers to the molecule of I_2. Answer questions 1-5, loo

Question

The phase diagram below refers to the molecule of I_2. Answer questions 1-5, looking at this diagram. __Only London forces are present in this molecule, yet the normal boiling point is higher than the one of water. Why? A) The liquid is denser than the solid B) The solid is denser than the liquid C) Iodine atoms have a lot of electrons and are big atoms D) It can make hydrogen bonding with water E) None of the above is the correct reason If the pressure on a gaseous sample of iodine at 90 degree C is increased from 0.01 atm to 0.10 atm, the sample will... A) Melt B) Sublimate C) Condense D) Evaporate E) None of the above __Solid iodine is__liquid iodine. A) denser than B) less dense than C) as dense as D) More info is needed to answer this question __ At 120 atm and 550 degree C, iodine is..... A) Solid B) Liquid C) Gas D) None of the above __The P (atm), T(degree C) coordinates of the triple point are: A) 115, 546 B) 1.00, 113.8 C) 1.00, 184 D) 0.12, 114.1

Explanation / Answer

1) Iodine (I) has a giant covalent lattice face centered cubic structure while H2O molecules are loosely bonded by Hydrogen bonds in a tetrahedral lattice.

Since less energy is required to separate hydrogen bonds compared with the crystalline lattice. water boils at a lower temperature.

E is the answer

2) B is the answer

Doing so make I2 to go solid region directly from gas ragion

3) A

4) D ( Beyond critical point, it becomes a supercritical fluid)

5)D

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