[Chemie] Wie könnte diese Aufgabe richtig lauten?
Guten Nachmittag,
wie könnte die Aufgabe b) komplett als Aufgabenstellung lauten? Gerne auch mit ausführlicher Erklärung der Aufgabe.
Ich habe nur dieses Bruchstück dieser Aufgabe (mir wurden die Aufgaben einer Klausur am Ende aufgeschrieben, ich war krank und diese Aufgabe konnte mir die andere Person nicht mehr ganz aufschreiben aufgrund von zu wenig Zeit).
Hi.
The task could be:
First, look at the reaction equation. We know:
Now we look at the conditions in which the substances react. 1 mol of C5H12 are reacted with 8 mol of O2, so:
n(O2)/n(C5H12) = 1/8
n(O2) =8 •n(C5H12)
Now we have given molar masses and the mass of C5H12. How to find the volume of O2. We can replace n left with V/Vm (Vm: molar volume) and right we replace n with m/M:
V(O2)/Vm= 8•[m(C5H12)/M(C5H12)]
V(O2) = 8•[m(C5H12)/M(C5H12)]•Vm
Now use the values:
V(O2) = 8•[10g/(72.15 g/mol)] • 24 L/mol
= 26,61 L.
That’s how you go ahead with CO2. Only there is the quantity ratio different.
LG
I do not really have the time to deal with it intensively. But it definitely looks very helpful. When I learn the days for chemistry, I will look at it intensively if you have to be able to do this in class work (and so I can find the question directly again is it as the only question on my list) 🙏
Good luck!
If the mass ratio N:O is equal to 7⁄4, you can easily expand to 28⁄16 and then see with the atomic masses 14 and 16 that the sum formula N2O must be.
It was actually about b), but still thank you 😉 Do you still like to explain to me b) exactly?
Tanning would formulate the task so (in my question it was incomplete):
Can you explain the task exactly to me? 🙂
“10 g of pentane and how much g of oxygen are completely
Incineration of the Pentan?” (Grammatic error corrected)
Thank you very much, if you would still like to explain how to best solve the task, this would really help me.