Question

19 ccc stability and change predict whether or not the substances in the table will sublime at stp. base your predictions only on the type of bond or intermolecular force holding the solid together. will it sublime? substance type of bond or intermolecular force sublime at stp? carbon dioxide (co₂) hydrogen fluoride (hf) calcium chloride (cacl₂) naphthalene (c₁₀h₈) iodine (i₂) sodium chloride (nacl) water (h₂o) 2 modeling ph

Explanation:

Step1: Identify bond/force for CO₂

CO₂ has weak London - dispersion forces. Low - boiling substances with weak intermolecular forces can sublime at STP.

Step2: Identify bond/force for HF

HF has hydrogen bonding. It has a relatively higher boiling point compared to substances with only London - dispersion forces, but can still sublime due to the relatively weak nature of hydrogen - bonding compared to ionic bonds.

Step3: Identify bond/force for CaCl₂

CaCl₂ has ionic bonds. Ionic compounds have high melting and boiling points and do not sublime at STP.

Step4: Identify bond/force for C₁₀H₈

Naphthalene has London - dispersion forces. It is a low - melting solid and can sublime at STP.

Step5: Identify bond/force for I₂

Iodine has London - dispersion forces. It can sublime at STP as it has relatively weak intermolecular forces.

Step6: Identify bond/force for NaCl

NaCl has ionic bonds. Ionic compounds do not sublime at STP due to strong ionic bonds.

Step7: Identify bond/force for H₂O

Water has hydrogen bonding. It does not sublime at STP under normal conditions as its hydrogen - bonding leads to a relatively high melting and boiling point range compared to substances that sublime at STP.

Answer:

Substance	Type of Bond or Intermolecular Force	Sublime at STP?
Hydrogen fluoride (HF)	Hydrogen bonding	Yes
Calcium chloride (CaCl₂)	Ionic bonds	No
Naphthalene (C₁₀H₈)	London - dispersion forces	Yes
Iodine (I₂)	London - dispersion forces	Yes
Sodium chloride (NaCl)	Ionic bonds	No
Water (H₂O)	Hydrogen bonding	No