al chem幾條問題 唔該

戰鬥王EX

1.關於negative catalyst
  點解decomposition of h2o2 can be slowed down by adding dil.hcl
  係咪因為佢係eqm 所以會shifts左去left hand side?

2.Zn2+ 個polarizing power好大?
  S2-個polarizability好大??
  先令到lattice enthalpy caculated from theoretical and experimental咁大??
  仲有冇其他解釋??
  因為就咁睇好難睇姐

3.我睇書佢話
  instantaneous dipole continnously change the orientation of its chagre,so  average dipole moment at a period of time is 0
佢想講d咩???

仲有本書話
organic compunds are usually insoluble in water but some have low molecular mass(e,g c2h5of) can form h-bond with h2o so they are soluble in water

點解大舊就唔可以form h-bond with water?

4.點解elements of hydrogen係 h2(g) 唔係h(g)?
  element個意思係exist in natural condition??

5.點解
  enthalpy change of formation of graphite係0
  而diamond就係1.9kjmol-1呢?

唔該哂

popi

1.淨係知-ve catalyst係provide一個high ea ge pathway for the reaction就得...
   eq果d野...要佢俾所有reaction equation俾我地先知
2.你想問theoretical同experimental results相差大?咁係最好ge解釋黎...
3.佢話係一段時間入面黎講instantaneous dipole因為不斷改變所以average黎講係=0
   因為大舊所以en會分散得開(o就得1粒 c同h就有好多粒) 所以form唔到h-bond
4.h一粒唔stable所以要form bond with h做h2
5.expermental results...姐係話graphite係carbon最stable ge form