What is overcome to melt a molecular solid? What is overcome to melt an ionic so

Question

What is overcome to melt a molecular solid? What is overcome to melt an ionic solid? How does this help explain why the melting points of ionic compounds are very high while the melting points of molecular solids are low? For Part 2, you are going to determine whether an unknown solid is ionic or molecular. Part of the procedure says, "You need to evaluate your results up to this point and decide if the melting/boiling point can be measured with such simple instrumentation. If this is applicable, then determine the melting and/or boiling point of your sample in a water bath." How will you know if this applicable? In Part 3, you are going to make models of various molecules. These molecules are given in the table shown in the next page. Complete the table in order to prepare to make these models in the experiment. You may need to seek other sources for the formula Make sure to cite your sources. Are all molecules the same size? How are do dispersion forces change as size change? Consider the difference between methane (CH_4) propane (CH_3CH_2CH_3), and pentane (CH_3CH_2CH_2CH_2CH_3) - how does size affect the macroscopic property of boiling point? What factors do you consider when assigning relative boiling points? a. Using this, assign the relative boiling points of the molecules given in number 5. b. Between carbon monoxide and water, which has a higher boiling point and why? What factors do you consider when assigning solubility? a. Using this, what is the solubility between methane and water? Will methane hydrogen bond with water? (If so, show this in a diagram) b. Using this, what is the solubility between carbon monoxide and water? Will carbon monoxide hydrogen bond with water? (If so, show this in a diagram)

Explanation / Answer

2.ans)

Molecular solids consisting of atoms or molecules held together by intermolecular forces. The strength of intermolecular forces vary. But these are very weaker than the ionic and covalent bonds. These have less energy to require to melt a solid than to break covalent bonds in molecules.

Ionic compounds are attractive forces that must be overcome in melting or ionic, the electrostatic attraction of ions.The forces between ions is intra ionic type.

Some compounds will decompose in to other simpler substance at a certain temparature.

Ionic compounds have high melting point because the Electrostatic interactions hold the compound together very strong.

Here the Electrostatic interactions between ation and Anion holds the compounds together because these are very strong interactions. Due to this the ionic compounds are melt they have high Melting Point.

The molecular compounds consists of bunch of molecules that are all stuck to one another using weak intermolecular forces.Due to this they doesn't take much energy to pull molecules away from each other and make the compound melt.

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