Wednesday, April 8, 2009

Chemistry PEKA Correction

for those who couldn't catch up or didn't bring their papers today. =)

Experiment 4.2

pg2:
Heat gievn out in the reaction
= ...
= ...
= 50 x 4.2 x 温差
= ...

...
So, heat produced during........

pg3:
Number of moles of CuSO4 used
= MV
= ...
= 0.01 mol

.
.
.

Heat gievn out in the reaction
= ...
= ...
= 50 x 4.2 x 温差
= ...

...
So, heat produced during........


***

Experiment 4.2

pg1:
Hypothesis: The heat of neutralisation ......

Manipulated variable: Different types of acids
Responding variable: Heat of neutralisation
Fixed variable: Concentrations and volumes ......

pg2:
So, formation of 1 mole of water ......

pg3:
So, formation of 1 mole of water ......

Discussion:
1. ...... hydroxide solution and hydrochloric acid is greater ......

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