Exam 2 Thoughts

[ltee]

gahh i lost like at least 7 marks. three from multiple choice. i didnt even got grams T_T i had kilograms of that ethanol to change from 18.5 to 100. gay. and i didnt get the ph either... can i still get an A? oh and how much was it out of

edit - that was according to sloth's results. i got the D for 8 as well, so maybe at least 6 marks

[melodrama]

D? arghhhhh damn. i'm on 3 now.

[kingmar]

Stupid mistake on the monounsaturated question.

But no-one down my end is complaining. I'll say I did comparatively well and leave it at that.

[hakeemthedream]

HEY GUYS

made my typical stupid mistakes costnig me big time

if i got 68/73 on 1st exam

and i get 80/84 on this one

can i still get 45 raw?

cheers

FUCK ph, didnt think, fuck oxidation, i put +1 and got wrong equation and fucked up question 4 multi im pretty sure

4 marks

[kingmar]

>>rant<<

Angry? :x

45 is possible. You've dropped 9 marks.
Based on this Unit 4 exam, which wasn't overly difficult, but tricky, the standard will remain unchanged, I suspect, considering it didn't change for Unit 3. People will fall for the tricks, and the last multi-choice was pretty craphouse.

[squance]

>>rant<<

 People will fall for the tricks, and the last multi-choice was pretty craphouse.

What was the last MC about again?

[Daniel15]

Cd is oxidised

That was it I think... The one where you had to write an explanation?
I wrote "Because it's cool like that. It's a totally awesome element" as the explanation  :lol:
They don't take marks off for stupid answers, do they? My thoughts are usually "If I have no clue how to answer this question, put a random answer"

[kingmar]

It was the conversion of energy.

Even on a bad day I couldn't devise such a shithouse worded question.

It was about which contributed the most energy to generate a specific amount of electricity. (this is better worded than the VCAA one)

Mechanical, Thermal, or Chemical.

I'm told the answer is Chemical contributes the most (then heat is lost), then thermal to drive the turbine (more heat lost), then mechanical (more heat loss).

Hence, the answer from least to most is Mechanical, Thermal, Chemical in terms of energy contribution to a specific amount of electricity generated.

Hence, answer is C.

[asa.hoshi]

What was the last MC about again?

During the production of electricity in a coal-fired power station, energy is present in the following forms.
I. mechanical energy of turbine.
II. chemical energy of coal and oxygen.
III. thermal energy of steam.

The amount of energy in each of these forms that take part in the generation of a fixed quantity of electricity is, from lowest to highest
A. III, I, II
B. I, II, III
C. I, III, II
D. II, III, I

[hakeemthedream]

scratch that possibly 6 marks

[kingmar]

For that question:

pH rises. Thus, H+ ion conc. decreases. Thus, H+ --> H2 (g).
Thus, H+ is reduced. Thus, Cd(s) is the reductant.

Cd is oxidised is strictly speaking incorrect unless you follow that working (or so I'm told).

[squance]

What was the last MC about again?

During the production of electricity in a coal-fired power station, energy is present in the following forms.
I. mechanical energy of turbine.
II. chemical energy of coal and oxygen.
III. thermal energy of steam.

The amount of energy in each of these forms that take part in the generation of a fixed quantity of electricity is, from lowest to highest
A. III, I, II
B. I, II, III
C. I, III, II
D. II, III, I

I put A........

Because thermal energy gave out the lowest energy or something??

[kingmar]

What was the last MC about again?

During the production of electricity in a coal-fired power station, energy is present in the following forms.
I. mechanical energy of turbine.
II. chemical energy of coal and oxygen.
III. thermal energy of steam.

The amount of energy in each of these forms that take part in the generation of a fixed quantity of electricity is, from lowest to highest
A. III, I, II
B. I, II, III
C. I, III, II
D. II, III, I

You have the exam? Might wanna post that in another thread w/ coblins answers so we don't splat that on people who want to discuss but don't wanna feel worse about dropping marks.

[kingmar]

It was the conversion of energy.

Even on a bad day I couldn't devise such a shithouse worded question.

It was about which contributed the most energy to generate a specific amount of electricity. (this is better worded than the VCAA one)

Mechanical, Thermal, or Chemical.

I'm told the answer is Chemical contributes the most (then heat is lost), then thermal to drive the turbine (more heat lost), then mechanical (more heat loss).

Hence, the answer from least to most is Mechanical, Thermal, Chemical in terms of energy contribution to a specific amount of electricity generated.

Hence, answer is C.

Self quote.

[asa.hoshi]

You have the exam? Might wanna post that in another thread w/ coblins answers so we don't splat that on people who want to discuss but don't wanna feel worse about dropping marks.

give me one good reason why i should type it up? coz it takes a while you know...