EXPERIMENT: KINETIC MOLECULAR THEORY
First experiment:
First of all we increase the temperature of one of the containers. Now we have two containers, one with hot water and another with cold water. From now on we are going to carry out the experiment.
Now, inside of the two containers we put the same quantity of potassium. Little by little we can see how the potassium is spreading through the two containersm, and while is becoming darker. But if we observe well we can see that in the left container is spreading faster, because the particles also move faster, this happen because when we increase the temperature the pressure also increase, this is the Charles's Law.
If we had just left the two containers three minutes more they will being equals, because the only difference is that in the hot container the particles spread faster than in the cold container. At the end the two containers will be the same, the same colour, all the same.
Second experiment:
In the second experiment, first of all we have shown that the syringue contains air. Demostrating with the following ways, we first caught and have covered the the tip, with the other side we made pressure. As we can see it was very difficult to make pressure and also didn't arrive till the end. The second way was the following, we took the syringue with the air inside and we make pressure inside a container woth bubbles, bubbles started coming out, there we have the proof that there was air.
Then, we check till where the syringue arrive pushing it with air inside it, and if after the syringue return back to its place of departure, as we can see in the video, it takes a little time to arrive.
The last part of the experiment that we do it's the following, we do exactly the same with the air, but what we can see here is that the syringe doesn't advance. This is because liquid particles are more united than the gas particles so we can't have the same laws as reference.
QUESTIONS:
Can you compress the air that it contained? Yes, we can.
What happens when I leave to strain on the plunger without uncovering the tip of the syringe? That the syringe go back to its first position.
Use teh Boyle's Law and the Mariotte Law to calculate what strength have exerted on the plunger of the syringe.
Boyle's Law:
P1*V1=P2*V2
101.325*60 = P2*40
P2= 151,987,5
Third experiment:
In the third experiment we can see how increase the temperature and the volume also increases little by little, this occour because when we increase the temperature the particles move faster and faster so the volume also increase. This is a demostration of the Charles's Law. We can see it best if we heat it more or if we stay heating it longer.
The kinetic molecular theory explains the separation of atoms or molecules,it allows us to discover why it exists, and as, of course, the different types of states queson: solid, liquid and gaseous. This is very important because we should know what happens around us and not only ask because when water boils steam or because frioscaen places very little snowflakes in the summer melt and turn into water. This behavior may be very common but is very interesting, we will see temperature greatly influences the energy and so many factors such as volume, pressure, etc.
