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hmm...It was -129 100%
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hmm...It was -129 100%
but there was no H2O in the equation! I looked that up like 3 or 4 times searching for H2O. :/there is an enthalpy change when H2 goes to H2O and thats what we apply in hesses aw when using values of combustion...it was -129
Yup I did it like hundred times : -129 confirmedIt was -129 100%
One more thing about enthalpy change. How was it 129, + or -. mine was coming 400 something
I asked some candidate( s ) who got 129 kJper mol , but they took also the enthalpy change of combustion of H2( g ) while making the cycle ( Hess's law ). I thought data of enthalpy change of combustion of H2( g ) was a trick! Because there's no enthalpy change from H2 ( g ) to H2 ( g )!
Anyone else got this??
so what you made is wrong?I hadn't notice it was SKELETAL formula that was asked for the cis-trans isomer(silly mistake I know) but I saw it like when 5 mins was left, and I hastily drew these. Do you think I'll get my marks?
2 moles of H2?? H2O ?? I looked up for both of these points, as far as I remember.ofcourse there is an enthalpy change of combustion for H2. It forms water on combustion. and since there was 2 moles of H2 you had to multiply the value by two. the answer was -129
so what you made is wrong?
because i made the same as youurs!
2 moles of H2?? H2O ?? I looked up for both of these points, as far as I remember.
maybe I should wear glasses from now on
rightThere was no H2O in the equation. but the chart gave the enthalpy of combustion values, so you ha d to include both CO2 and H2O in the Hess's cycle.
i wrote the same i think addtion and oxidation are correct elimination m also doubtful!Guys for the reaction part in Q 3 i wrote Elimination, oxidation and addition.....Are they correct?
Yes yes exactly the same thing :|Am not too sure... Because I made these in a hurry (last 5 mins).... Someone on this forum told me you are not supposed to put C and H atoms in a skeletal formula... You drew exactly the same thing?
i wrote the same i think addtion and oxidation are correct elimination m also doubtful!
Yes yes exactly the same thing :|
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