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CHEM AND BIO HELP AND TIPS HERE

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nid404:
d) ii) A difference in temp change because of different conc of acid prolly.. cause usually the heat of neutralization is constant for any neutralization.-57kj/mol

e) After an hour it temp will fall back to the initial room temp. that is because the heat will be lost to the surrounding. The mixture will begin to cool

f) greater accuracy could be obtained by using a burette to take measurements.

WARRIOR:

--- Quote from: nid404 on May 14, 2010, 04:29:03 pm ---d) ii) A difference in temp change because of different conc of acid prolly.. cause usually the heat of neutralization is constant for any neutralization.-57kj/mol

e) After an hour it temp will fall back to the initial room temp. that is because the heat will be lost to the surrounding. The mixture will begin to cool

f) greater accuracy could be obtained by using a burette to take measurements.




--- End quote ---

for d 2 ) the asnweer in past paper is DOUBLING REACTION RELEASES DOUBLE OF ENERGY ..makes any sense to you?
i understood ur answer thx tho

and can you go till g +

nid404:
okay...doubling reaction? i don't see the reaction being double :-\

anyway

g) 1 shows greater change because total volume of reactants is lesser

H=mcdeltat

mass is proportional to the volume...greater mass, lower Temp change

nid404:
h) temp change will be lower

heat is contained in a  greater volume of liquid.

Same theory as above

WARRIOR:
I see hmm...i just dont get where the heat goes away to..? the heat is absorbed by the "more " volume of the liqiuid??



By the way ill give u 1+ rep..but after 2 hours cz i just gave some1 :P thx for ur time and help


hmm answr for h) is wrong ... the asnwer is

temp rise is 16 ( double )

explanation : complete neutralisation takes place ..doubling te temp change as exp 1 not all acid was neutralised.. (understandable )

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