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knowitall10 xhizors thanx alot
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Both, the marking scheme and the examiner's report say that no mark if sealed. So i u shouldnt place the lid. another point i noticed is tht the examiner's report said the the student confused the exp with standard enthalpy so that means that u only prevent heat loss in the enthalpy change questions.in j11 52 c we are trying to find the rate of rxn but we are not keeping the lid on the beaker. i dont understand that to take out rate of rxn accurately shouldnt we try to reduce heat loss by putting lid?
papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s10_qp_52.pdf
No problem Any time!knowitall10 xhizors thanx alot
what is the relation between the rate and heat loss??in j11 52 c we are trying to find the rate of rxn but we are not keeping the lid on the beaker. i dont understand that to take out rate of rxn accurately shouldnt we try to reduce heat loss by putting lid?
papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s10_qp_52.pdf
"Gas not equilibriated with increased temp" means that the volume was taken before the gas actually reaached equilibrium. in other words, the volume was recorded before 5 minutes were over. in the question, they place the syringe in increased temp for five mins, right? So at that temp, the student recrded the volume before five mins.in j12 51 2c) what is the reason for the anomalous pts and can u explain the equilibrating thing again
yea.. when the question says "give step by step discrip. by...." then you describe only those points, that'll be sufficient. but if the question says "give a step by step descrip. including...." then i recommend you describe the full procedure INCLUDING the points the question gave you.Hi
In p5
Question 1 when they ask u to give step by step description for planning an experiment and they give points to talk about, do we describe only those points?
Eg p5 o/n 12 q 1e
haha.. i don't think anything would happen, but i strongly recommend that you dont
It depends on your line.. because when you get an anomalous on either side, they are never exactly the same dist away from the line. Look at my line below: The distance of A2 from the line is more than the distance of A1. So to describe the reason why A2 is anomalous, we'd talk about the y-axis. and to describe why A1 is anomalous, we'd talk about the x-axis. understand?ok in n07 can u also explain the anomalous point at 7.5 time why did we write that the volume was measured too early and why did we not write that the point was below the line so the volume was recorded late. i want to know that when points are above the line do we assosciate them with x axis or y axis and the same for points below the line. This a very important question guys plzz answer it.
so is it always that the point which is further away from the line, we describe y-axis? what if there are 3 anomalies?It depends on your line.. because when you get an anomalous on either side, they are never exactly the same dist away from the line. Look at my line below: The distance of A2 from the line is more than the distance of A1. So to describe the reason why A2 is anomalous, we'd talk about the y-axis. and to describe why A1 is anomalous, we'd talk about the x-axis. understand? View attachment 25315
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