• Want to help us with this year's BoS Trials?
    Let us know before 30 June. See this thread for details
  • Looking for HSC notes and resources?
    Check out our Notes & Resources page

Hiya ! ineed help with my chem assy (1 Viewer)

AimingHigh93

Member
Joined
Oct 9, 2008
Messages
43
Location
in a room full of mirrors
Gender
Male
HSC
2010
i cant find any info on these point can someone help PLOX

either link me or give detailed response for the following

outline the changes in molecules during chemical reactions in terms of bond breaking and making

Explain that energy is required to break bonds


thnx in ADV going doctors now EYEZ SICK U C so be back soon

im BACK i have the flu :(
 
Last edited:

Jaylee42003

Member
Joined
Oct 18, 2008
Messages
427
Location
I'm in north sydney bitch
Gender
Female
HSC
2011
i cant find any info on these point can someone help PLOX

either link me or give detailed response for the following

outline the changes in molecules during chemical reactions in terms of bond breaking and making

Explain that energy is required to break bonds


thnx in ADV going doctors now EYEZ SICK U C so be back soon

im BACK i have the flu :(
You have an essay for chemistry? How unfortunate.
If you're sick maybe you should get an estimate instead. Only prelim, so it won't really matter.

Also, you might want to browse the chem section on BoS and the resources...
 

h3ll h0und

Member
Joined
Sep 19, 2008
Messages
341
Gender
Male
HSC
2010
in chemical reactions, bonds between reactant molecules are broken and rearranged and established. For this to occur, a sufficient amount of energy is required (in the form of activation energy) for reactant molecules to collide into each other and break bonds - these are called a productive collisions. Bonds are also established in chemical reactions and when this occurs, energy is released. If a reaction is endothermic, then overall, there is more bonds being broken than bonds being established and if a reaction is exothermic, there are more bonds being established than bonds being broken.
endothermic reaction - change in enthalpy (delta H) is positive
exothermic reaction - change in enthalpy (delta H) is negative

lol it mite be a bit dodgy...was on the spot
hope this helped =D
 

h3ll h0und

Member
Joined
Sep 19, 2008
Messages
341
Gender
Male
HSC
2010
and as jaylee said...look through chem resources for notes...they shud have better responses than mines =D
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top