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

[AimingHigh93]

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

 

[Jaylee42003]

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]

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]

and as jaylee said...look through chem resources for notes...they shud have better responses than mines =D