thermodynamics help

First law for an open system:

Q_{12} + W{12} = \Delta H + \Delta KE + \Delta PE

In the first problem no heat, no change in KE, no change in PE:

W_{12} = \Delta H = H_2 - H_1

Easy peasy.

For the 2nd problem it's the same only there IS a change of kinetic energy:

W_{12} = \Delta H + \Delta KE = H_2 - H_1 + \frac{1}{2}m(u_2^2 - u_1^2)

Divide through by mass and you get specific properties!

w_{12} = \Delta h + \Delta ke = h_2 - h_1 + \frac{1}{2}(u_2^2 - u_1^2)

And remember that for a perfect gas!

h = C_{p}T

Reply 2

From Manosh himself....

lol

Reply 3

griffinsnight

From Manosh himself....

lol

o.0

Don't ruin my 2nd year! I'm trying to go through it without ever hearing of or seeing that man :P.

Let me be Manosh free until next year, please!

Reply 4

Mush

o.0

Don't ruin my 2nd year! I'm trying to go through it without ever hearing of or seeing that man :P.

Let me be Manosh free until next year, please!

He is a babe though!

I think he's pretty decent actually -it's the class that muck up his lectures because none of them can be bothered listening past his admittedly thick accent and listening to his teaching.

Manosh ftw! :P

EDIT: Wait - if we make it through to 3rd year we get him again???

Reply 5

griffinsnight

He is a babe though!

I think he's pretty decent actually -it's the class that muck up his lectures because none of them can be bothered listening past his admittedly thick accent and listening to his teaching.

Manosh ftw! :P

EDIT: Wait - if we make it through to 3rd year we get him again???

But the class are perfectly fine with Coton, no? And they're probably perfectly fine with Scott Roy and the Maths lecturers too. Manosh, I'm willing to bet, is the only one. He's a crap lecturer, simple as that. To be a good lecturer you're supposed to make the material engaging, interesting, exciting etc to the point that nobody WANTS to carry on, and they WANT to listen. He does none of these, and less. Nothing to do with his accent. Even if he was Scottish, and had the same attitudes/mannerisms/tone, I'd think he were ****. But on the topic of his accent; if you can't pronounce the name of your own subject, then you shouldn't be teaching it, imo. "Dermojinamies".

I'm not actually sure if we get him next year tbh. I've heard rumour of that but I think that might just be because he teaches a similarly named course that we, only he does it for Mechs perhaps. I don't know, I'll let you know in September.

Reply 6

Mush

But the class are perfectly fine with Coton, no? And they're probably perfectly fine with Scott Roy and the Maths lecturers too. Manosh, I'm willing to bet, is the only one. He's a crap lecturer, simple as that. To be a good lecturer you're supposed to make the material engaging, interesting, exciting etc to the point that nobody WANTS to carry on, and they WANT to listen. He does none of these, and less. Nothing to do with his accent. Even if he was Scottish, and had the same attitudes/mannerisms/tone, I'd think he were ****. But on the topic of his accent; if you can't pronounce the name of your own subject, then you shouldn't be teaching it, imo. "Dermojinamies".

I'm not actually sure if we get him next year tbh. I've heard rumour of that but I think that might just be because he teaches a similarly named course that we, only he does it for Mechs perhaps. I don't know, I'll let you know in September.

Wow, that rant did earn a lol

I wanted to stay for Manosh's lectures - mainly because of his banter though so I've sort of just pied myself...oops :frown:

His lecture notes are good you have to admit - with the exception of a few typos...

By the by - good luck avoiding him :biggrin:

Reply 7

griffinsnight

Wow, that rant did earn a lol

I wanted to stay for Manosh's lectures - mainly because of his banter though so I've sort of just pied myself...oops :frown:

His lecture notes are good you have to admit - with the exception of a few typos...

By the by - good luck avoiding him :biggrin:

The lecture notes you guys have this year are vastly superior to the absolute garbage we were given last year. I think last year was his first year teaching that course and he was TOTALLY unprepared. I would have killed for your lecture notes last year lol. Last year he was incompetent in every imaginable way. He probably is a bit better this year... with last years experience behind him. But my my he was awful last year.

Still got an A1 though (H).

Your exam was on monday though, eh? So now you don't have to see him 'til third year :P. How'd it go?

Lmfao. By the by. Hahaahahahahaha!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Reply 8