AL chem (ii)

Tung

Originally posted by 納比 at 2005-4-19 06:06 PM:

同我阿SIR一九樣,我地班唔係訓果D,就吹水,佢繼續自己講俾自己聽,佢條友照讀PP上面D字,真係俾佢吹九漲,我唔識睇咩,你真係教番少少有幫助架啦,出卷又求其,份MOCK集合晒各年PP最淺既題目,等我唔溫都有5X分,而家出 ...

我阿sir份mock仲醒, 用0304組成,連number都唔改, 連section一樣...
不過都係得一個合格..

Tung

Originally posted by Tung at 2005-4-19 06:09 PM:

我阿sir份mock仲醒, 用0304組成,連number都唔改, 連section一樣...
不過都係得一個合格..

個個合格既仲要係因為份essay20分先合格...
但係in fact佢無嘜points...阿sir話送分...
得1句既都有分...5分...

納比

Originally posted by Tung at 2005-4-19 06:12 PM:


個個合格既仲要係因為份essay20分先合格...
但係in fact佢無嘜points...阿sir話送分...
得1句既都有分...5分...

咁佢又勁D

納比

Originally posted by Tung at 2005-4-19 06:09 PM:

我阿sir份mock仲醒, 用0304組成,連number都唔改, 連section一樣...
不過都係得一個合格..

大家同病相憐啦

Tung

唉..
要垃圾, 要求其都有限度丫..
簡直係置學生生死於不顧...

Newcastle Fans

paper II都算淺... esp. organic... no.5有機full mark (個enthalpy change... 係咪一個-48.XX, 一個-46.XX?)
但paper I真係.................
篇essay死得好慘
5分都唔知有冇 (因為我冇寫最重要既野-----fuel cell)
又寫左好多air pollution既野 -______-
我諗得50%左右... 好差

btw, 到底有冇人知Paper II 4(b)點做?

MZN

Originally posted by Newcastle Fans at 2005-4-19 07:02 PM:
paper II都算淺... esp. organic... no.5有機full mark (個enthalpy change... 係咪一個-48.XX, 一個-46.XX?)
但paper I真係.................
篇essay死得好慘
5分都唔知有冇 (因為我冇寫最重要既野-----fue ...

enthalpy change 起碼過千...
無可能咁少.
----------
4b
i)
Path I: Al + dil H2SO4 ---> product + NaOH
Path II: Al + NaOH + H2O --> product --> NaOH.....(唔知arm唔arm, 無讀inorg)
ii)
計數only
iii)
Path I, 用少d料

Newcastle Fans

Originally posted by MZN at 2005-4-19 19:26:
enthalpy change 起碼過千...
無可能咁少.
----------
4b
i)
Path I: Al + dil H2SO4 ---> product + NaOH
Path II: Al + NaOH + H2O --> product --> NaOH.....(唔知arm唔arm, 無讀inorg)
ii)
計數only
iii)
Path I, 用少d料

for enthalpy change:
what I mean is part (ii)... the enthalpy change of combustion of gasoline with/without enthanol

for no. 4(b)
path I:
2 Al + 3 H2SO4 ---> Al2(SO4)3 + 3 H2
Al2(SO4)3 + 6 NaOH ---> 2 Al(OH)3 + 3 H2O
path II:
Al + 3 H+ ---> Al3+
Al3+ + 3NaOH ---> 3 Na+ + Al(OH)3
Al(OH)3 + NaOH ---> Na[Al(OH)4] (due the excess NaOH)
Na[Al(OH)4] + H+ ---> Al(OH)3 + H2O + Na+

path II is better as it ensures that all Al(s) is converted to Al(OH)3

不過應該唔岩... 太天馬行空喇

Newcastle Fans

同埋... 有咩辦法可以盡快拎到paper I既題目?
想predict自己拎幾多... 安心D

納比

Originally posted by Newcastle Fans at 2005-4-19 07:02 PM:
paper II都算淺... esp. organic... no.5有機full mark (個enthalpy change... 係咪一個-48.XX, 一個-46.XX?)

我都好似係,你驚唔驚

納比

Originally posted by MZN at 2005-4-19 07:26 PM:

enthalpy change 起碼過千...
無可能咁少.

佢per g喎,唔係per mol喎

Newcastle Fans

Originally posted by 納比 at 2005-4-19 20:35:

我都好似係,你驚唔驚

放心, 我地8分袋袋平安


















我估

Newcastle Fans

MZN... 快D入黎解畫
唔好嚇我地

納比

Originally posted by Newcastle Fans at 2005-4-19 08:40 PM:
MZN... 快D入黎解畫
唔好嚇我地

你predict中文拿e/f

久違

Originally posted by Newcastle Fans at 2005-4-19 07:58 PM:
同埋... 有咩辦法可以盡快拎到paper I既題目?
想predict自己拎幾多... 安心D

好似好有信心咁wor

Newcastle Fans

Originally posted by 久違 at 2005-4-19 21:12:

好似好有信心咁wor

no la
paper II都還好 (應該過七成)
但paper I死得好慘
C應該冇問題
但B就唔得喇 (阿sir一定大跌眼鏡)
睇黎我都諗定year 2點transfer (如果我有幸入U)

Newcastle Fans

Originally posted by 納比 at 2005-4-19 21:02:

你predict中文拿e/f

唉...

久違

Originally posted by Newcastle Fans at 2005-4-19 09:18 PM:

no la
paper II都還好 (應該過七成)
但paper I死得好慘
C應該冇問題
但B就唔得喇 (阿sir一定大跌眼鏡)
睇黎我都諗定year 2點transfer (如果我有幸入U)

唔好對paper la...我對左pure...感覺唔多好
u...你入緊啦~~hoho

Newcastle Fans

Originally posted by 久違 at 2005-4-19 21:20:

唔好對paper la...我對左pure...感覺唔多好
u...你入緊啦~~hoho

我想對下... 睇下係咪真係有五成
定係更差

beckham312oo

Originally posted by Newcastle Fans at 2005-4-19 09:25 PM:

我想對下... 睇下係咪真係有五成
定係更差

放心....如果 paper 2 70%都差不多左A ga la