[DSE化學2018]同學準備好DSE CHEM未? (3)
化學艾維斯
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abc同一頁都得
可以 我寫開acidic
not accept
喺佢start reaction果下拉90度垂直線
落斜果度拉多條直線 睇兩條線交點就係Tf
開頭水平線係Ti
落斜果度拉多條直線 睇兩條線交點就係Tf
開頭水平線係Ti
問C60就C60 佢加K+或者做成carbon nanotubes係其他情況
individually exist molecule 唔通電
Cl2(aq)好微量出HCl & HOCl 講到好嚴格會輕微通電 但佢唔會問得咁含糊
Cl2(aq)好微量出HCl & HOCl 講到好嚴格會輕微通電 但佢唔會問得咁含糊
你搵返出黎乜都得
FeO Fe3O4 also black
in aqueous yes
in aqueous yes
其實paper 1同paper2答既catalyst definition 係咪唔同？
定係都要寫晒provide alternative pathway + chemically unchange
定係都要寫晒provide alternative pathway + chemically unchange點會唔同 知識係互通
純粹係paper 1唔會直接問Ea果d關係
純粹係paper 1唔會直接問Ea果d關係
thanks
Haber process:
N2+3H2 <-> 2NH3
Condition: 200 celsius 500 atm
catalyst: finely divied iron
Steam reforming:
CH4+H2O <-> CO+3H2
Condition: 850 celsius 20 atm
catalyst: NiO
Methanol synthesis:
CO+2H2 <-> CH3OH
Condition: 250 celsius 100 atm
catalyst: Cu/ZnO/Al2O3
Water-gas shift reaction:
CO+H2O <-> CO2+H2
Condition:
catalyst:
Ostwald process:
4NH3+5O2->4NO+6H2O
2NO+O2->2NO2
4NO2+O2+2H2O->4HNO3
有錯勿屌
求補充/修改/增加
N2+3H2 <-> 2NH3
Condition: 200 celsius 500 atm
catalyst: finely divied iron
Steam reforming:
CH4+H2O <-> CO+3H2
Condition: 850 celsius 20 atm
catalyst: NiO
Methanol synthesis:
CO+2H2 <-> CH3OH
Condition: 250 celsius 100 atm
catalyst: Cu/ZnO/Al2O3
Water-gas shift reaction:
CO+H2O <-> CO2+H2
Condition:
catalyst:
Ostwald process:
4NH3+5O2->4NO+6H2O
2NO+O2->2NO2
4NO2+O2+2H2O->4HNO3
有錯勿屌
求補充/修改/增加
Haber process:
N2+3H2 <-> 2NH3
Condition: 450°C 250atm
catalyst: finely divied iron
Steam reforming:
CH4+H2O <-> CO+3H2
Condition: 850 celsius 20 atm
catalyst: NiO
Methanol synthesis:
CO+2H2 <-> CH3OH
Condition: 250 celsius 100 atm
catalyst: Cu/ZnO/Al2O3
Water-gas shift reaction:
CO+H2O <-> CO2+H2
Condition:
catalyst:
Ostwald process:
4NH3+5O2->4NO+6H2O
Catalyst: Pt 900°C 10atm
2NO+O2->2NO2
4NO2+O2+2H2O->4HNO3
有錯勿屌
求補充/修改/增加
out syl
如果Ea=0
log k = log A (constant)
rate is independent of T
e.g. radioactive decay
所以可以用碳-14定化石年期
如果Ea=0
log k = log A (constant)
rate is independent of T
e.g. radioactive decay
所以可以用碳-14定化石年期
正確係用GCMS 我自己當年都係咁答
無嚴格捉
poisonous指highly toxic
poisonous指highly toxic
某程度上石以咁講
但係
唔係temp increase, KE/speed of molecules increase,
frequency of collision & effective collision 都會increase咩
唔係temp increase, KE/speed of molecules increase,
frequency of collision & effective collision 都會increase咩
呢一刻我只可以同你講
Ea愈低 T對rate既影響力就愈低
Ea愈低 T對rate既影響力就愈低