Recent content by Kasper_NYC

Ygggdrasil, By chance reviewing my book of physics I have found an exercise about Isothermal Expansion; and the R constant is “8.31 J/mol K”, and not “0.082 l atm/K mol” as I set the first time, because “n” in the equation refers to the number of moles. Also I did another mistake, Vb refers to...

This article is really interesting: The Economics of Small to Medium Liquid Hydrogen Facilities http://www.rmwsolutions.net/pub3.pdf Otherwise I don't see easy at all to keep the hydrogen liquefied in a tank in ours cars... and just compressed doesn't make too much sense to me either. I guess...

Hi, Here they explain that the first chief engineer was John F. Wallace, but he quit early... http://www.ilovelanguages.com/tyler/nonfiction/pan2.html And in this document you can read: http://www.pbs.org/wgbh/amex/tr/panama.html "Dr. William Gorgas, who had helped to eradicate yellow...

Do you mean something like this?: http://www.ampl.com/DOWNLOADS

Excuse me please, The other question should be: " If 1 (cal/sec) / (cm2 C/cm) = 419 W/m K”; is it 419 W/m K equivalent to 4.19 W/cm K?" Thanks again.

Hi, I have read that Thermal Conductivity means: “The thermal conductivity of a substance is the quantity of heat in cal/sec passing through a body 1 cm thick with a cross section of 1 sq. cm when the temperature difference between the hot and cold sides of the body is 1 deg. C.”...

Hi Irid, Thanks for your answer. Before you answer me I posted also in other forum in order to compare results. This problem seems to be a little bite tricky. I have tried the formula you suggested and I have got this: P: 980665 Pa \rho: 18.7 Kg/m\overline{}3 \nu = 229 m/s I have...

Hi, you were traveling at 30.02m/s, so in 1 second you will cover 30.02m, and you need 1 second to react. So at least you have to be a 30.02 meters distance from the car that is ahead of you.

Hi, Please, what is the formula to calculate the speed (velocity) of an exiting flow of gas from a pressured deposit? For example, it is supposed a deposit, that contains gas CO2, at 10 atmospheres of pressure (980.665 KPa), with a density of 18.7 Kg/m^3, at 288.15 K (59 F) of temperature...

Chemisttree and GCT, Thanks again for your answers, but I think there is a misunderstanding in all this, because I didn’t explain completely my proposal. The system that I suggested was supposed to be “ideal and isolated, without heat losses”. So, what I wanted to suggest was a system where the...

Thanks Ygggdrasil, it is true, I mess up that Work is measured in Joules. Such a mistake! It is usual in me. I have been thinking about your answer, I have reviewed again all the information that I have about Thermodynamics Processes, but still I can’t figure out what kind of thermodynamic...

Thank you Russ! You posted while I was writing my answer with my Word processor (I got to check my English the all time), and I didn’t realize your post with the link. Thanks both of you.

Hi, Ygggdrasil. Thank you! I have look at it as you explained to me. From this web: http://test.sdsu.edu/testhome/Test/solve/basics/tables/tablesComb/formation.html I found the “heat of formation of CO”: and I guess it is: -110.5 Kj/mol. (I am not sure because shows two different values, but...

What kind of thermodynamic process is the compression of a gas when the volume varies reducing it, and the temperature increase, and there is an exchange of temperature with the exterior (the walls of the compressor are refrigerated, but I assume that the gas will increase its temperature a...

GCT, Also the combustion of CH4 in a poor oxygen atmosphere could give Carbon Monoxide and Water… and the reading of the combustion could be a lot more complicate with so many other index if needed, but that wasn’t the case. Just I wanted to confirm the estimation that I posted. Thanks again.