how do you know whether to talk about the bonds or the intermollecular forces....because at school ive learnt that sometimes its the bonds and sometimes its the intermollcular forces that affect melting and boiling points.... as in how they break
bond example? giant covalent bond
so help me out? in an exam how do i figure out whether to talk about the bonds or intermollecular forces?
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when talking about melting and boiling points...this ones tough watch
- Thread Starter
- 13-01-2010 19:27
- 13-01-2010 19:29
melting and boiling points are simply interconversion of states, no bonds are broken or created. It is not a reaction, it is a process.
- 13-01-2010 19:43
Giant Structure - Intermolecular
- 13-01-2010 19:52
simple molecules= LOW MELTING AND BOILING POINTS, due to the WEAK VAN DER WAALS FORCES, this makes it easier to break the bonds,
ionic compounds= held in giant ionic structure with STRONG ATTRACTION HOLDING THE OPPOSITLEY CHARGED IONS, making it harder to break the bonds.
metallic bonding= GIANT METALLIC STRUCTURE with posotive ions surrounded by a sea of delocallised electrons, high mpt and bpt due the the strong attraction.. i thinkso. HIGHER CHARGE = HIGHER MPT AND BPT
covalent= strong covalent bons holding molcules together, lots of energy needed t break bons. learn diamong and graphite