Homework Help: Chemistry

Posted by Rebekah on Monday, February 28, 2011 at 6:46pm.

Of each pair of solids, which one has the higher melting point?

a) HCl and KCl
b) Cu and Kr.

Can you please explain? How do you know the melting point? Is it the type of intermolecular force that they have?

thanks!

Chemistry - DrBob222, Monday, February 28, 2011 at 8:26pm
There are a number of things to look at. For a, HCl is largely a covalent bond (although polar covalent) while KCl is an ionic solid. Ionic solids melt higher than most covalently bonded materials because the ionic solids must break the crystal lattice bonds. Cu has metallic bonding and Kr has only dispersion forces.

Answer this Question

Related Questions

chem help urgent! - i only have one submission for these and i dont' really ...
Chemistry - Which of the following is NOT true? (A) CH2O Has a relatively high ...
Chemistry - Explain in terms of forces between structural units why H2O2 has a ...
chemistry - What is the relationship between the molar mass of Ne, Ar, Kr, and ...
Chemistry - A student who was isolating aspirin stopped the experiment after ...
Chem - The melting point of KCl is 776 C whereas the melting point of NaCl is ...
Chemistry - Why does MgO have a higher melting point than CaS? They are both ...
chemistry - 1.predict and expalain the order of melting point for propanol, ...
chemistry please help - Which of these pairs of substances in aqueous solution ...
chemistry - Melting point experiment: how do i know the calibration curve? we ...

For Further Reading

First Name:
School Subject:
Answer: