# Killer Kyle 24 replies

Pethegreat VIP Member

Lord of the Peach

70 XP

19th April 2004

20,892 Posts

#1 8 years ago

Do you know anything about gas compressibility?

I know you know the rankie cycle.

Guest

I didn't make it!

0 XP

#2 8 years ago

Pethegreat;5421850Do you know anything about gas compressibility?

I know you know the rankie cycle.

hmm no point asking me i dunno

Nittany Tiger Forum Mod

*Shrug*

289,179 XP

15th September 2004

27,142 Posts

#3 8 years ago

Mostly, yeah. Isn't the Rankine Cycle for steam engines? Those run between gas and water, though.

We never did any work or go over Rankine cycles in my last two thermo classes. It's always Carnot cycles (everyone loves the Carnot cycle ;)) and I did some HW on the Stirling Engine cycle.

Pethegreat VIP Member

Lord of the Peach

70 XP

19th April 2004

20,892 Posts

#4 8 years ago

I just need to know how I treat the del v over del P term in the first equation listed on this page

Compressibility - Wikipedia, the free encyclopedia

I have a constant temperature assumption.

Ballmer

I'll EAT the internet!

50 XP

5th August 2010

867 Posts

#5 8 years ago
Nittany Tiger Forum Mod

*Shrug*

289,179 XP

15th September 2004

27,142 Posts

#6 8 years ago

Are you talking about the fact that you've never seeing those funny d's?

Pethegreat VIP Member

Lord of the Peach

70 XP

19th April 2004

20,892 Posts

#7 8 years ago
Killer Kyle;5422421Are you talking about the fact that you've never seeing those funny d's?

I have seen them before. I think I simply have to take the partial derivative of my volume expression(PV=ZnRT) with respect to pressure, but I am not certain.

I still got another day to work on it.

Nittany Tiger Forum Mod

*Shrug*

289,179 XP

15th September 2004

27,142 Posts

#8 8 years ago

You're on the right track. I've never seen the Ideal Gas Law with a Z in it before, though. Isothermal also means that you can throw T out of the derivative.

Pb2Au

Droolworthy

50 XP

4th October 2004

8,461 Posts

#9 8 years ago

The ideal gas law doesn't have Z in it. The compressibility factor for gas (Z) is what turns the ideal law into the real law. At STP Z=1. Pethe, when I get home tonight I'll see if I can dig up my old thermo work.

Pb2Au

Droolworthy

50 XP

4th October 2004

8,461 Posts

#10 8 years ago

We did Otto, diesel, Rankine and Carnot.