VilJ

n_mono* not V_ads

Hello guys, My surfaces professor likes to put BET problems into his exams. Me and my classmates seem to have a problem with one of the exercises. So the question is pretty much the same in both exercises in this post, calculate the constant C, monolayer, and then find the specific area. So in the second problem (last two photos), finding these values and calculating the specific area has been quite easy, but now when trying to form the plot ourselves there seems to be a problem. We get too low values with this given data and the formula for Y-values. Even in the other exercise with the premade plot, the data doesn't give the same curve if we try to do it by hand. Is there something we are missing here?

That seems totally unnecessary dude I went through the exercise with the recommended textbook to come up with this solution and put a more detailed answer up here. Idk why you feel the urge to be an asshole about it...

Okay, so I did the exercise again and noticed that in this teacher's following exam, he had the same question except he asked us to estimate the water pile as a cylinder. Here is what I've done with a little bit more detail. The answer is exactly the same.

So you're telling me that I'm supposed to work with r rather than h/2? I found this example which stated that this problem is supposed to be calculated differently. If I calculate with just r then this is super simple.

This is what I've had for this one... Where am I going wrong?

The first thing I did was to express r in terms of h and theta, but then I won't be able to preserve the h? My bad I'm new here Thanks for the help! Ps. This is actually an exam that I'm trying to get done before the real one. The first thing I did was to express r in terms of h and theta, but then I won't be able to preserve the h?

This problem doesn't seem complicated, but I still can't get it done. I can't figure out how to write the equation with all the required parameters in the first part. I have used the Laplace equation for this one (This is probably correct). Also the third part, How can I calculate the force with knowledge of the dimensions of the plates?