IM forces-substances of increasing melting points

by joe98
Tags: forcessubstances, increasing, melting, points
joe98 is offline
May4-12, 11:40 PM
P: 27
Q.In which of the answers below are the substances listed in order of increasing melting
a) Cl2 < CHF3 < H2O < CHCl3 < SiO2
b) Cl2 < CHCl3 < CHF3 < H2O < SiO2
c) Cl2 < CHF3 < CHCl3 < H2O < SiO2
d) Cl2 < H2O < CHF3 < CHCl3 < SiO2
e) SiO2 < H2O < CHCl3 < CHF3 < Cl2

How can we tell the melting points of these substances by there intermolecular forces?

ok H20 has hydrogen bonding, SiO2 has strong covalent bonds,CHF3 has dipole forces

So how can develop a trend in melting points with the IM forces?

Any suggestions?

The answer is C
Phys.Org News Partner Chemistry news on
Patented research remotely detects nitrogen-rich explosives
Pocket-sized anthrax detector aids global agriculture
Structure of sodium channels different than previously believed
jd12345 is offline
May5-12, 12:56 AM
P: 260
SiO2 is a giant covalent structure - a macromolecule so it has the highest melting point
H2O has hydrogen bonding
Cl2 a gas has the lowest melting point as only vanderwaal ofrces exist

I'm not sure about CHCl3 and CHF3 - i though CHF3 will have a higher MP because of hydrogen bonding

Register to reply

Related Discussions
Boiling and melting point of impure substances Chemistry 2
London Forces, current, and boiling and melting points Chemistry 6
Increasing the Melting Point via Pressure Increase Advanced Physics Homework 3
melting and boiling temperatures of different substances Introductory Physics Homework 2
boiling points, melting points and absorbed radiation Q's Introductory Physics Homework 0