Unknown vapor only.
In this lab you start with an unknown in the Dumas tube. You heat it
leave it at that temperature until all the liquid has evaporated. At th
you expect to have in the tube?
Unknown vapor and unknown liquid and air mole
In this lab you start with an unknown liquid in the Dumas tube and y
Celsius and leave it at that temperature until all the liquid has evapo
the tube to cool back to room temperature. At that time, what comp
in the tube?
Water is evaporating from the outside of the tub
When you weigh the Dumas tube on the balance, you observe that t
time. If it is decreasing rapidly, what is the most likely cause?