Talk:Calcium carbide

Untitled
Hello, I was wondering if anyone else noticed the sim. of calcium carbide & the guys who are running the ford escort in tampa,fl. on water! The gas engine would run much more efficent with acetylene added. It could be piped straight into the intake manifold, A small amount would be a big milage booster. Let's build our own gas saver! Delbert O'Neal. Louisville,ky.
 * May be not, acetylene is explosive (so too is gasolene). Pyrotec 21:34, 20 June 2006 (UTC)

Reaction to make acetylene
The article states that 1 gram of calcium carbide yields 349 mL (1mol carbide  0.0156 = 0.0156 acetylene, 1 mol gas = 22.4 lit and 0.0156 acetylene : 0.349 lit or 349 ml) of acetylene. Is that at STP or SATP, or some other conditions? This should be clarified.


 * Calculate it it is easy molecular weight of C and Ca forming H-C-C-H treated as ideal gas 1 mol is 22l.

Chemists normaly assume 25°C and normal atmospheric pressure for their experiments.--Stone 12:11, 12 November 2006 (UTC)

Hello, can you tell me in how much enthalpy changing the reaction between water and calsium carbide? i really appreciate if you can, because i really need the value right now, please

exlpoding things
I have been told that feeding Calcium Carbide to mammals such as Pigeons will cause them to expose due to the production of Acetylene when it comes into contact with the water in their stomachs and then with the air when they evacuate themselves. Has anyone any practical experience on this? I believe whether it is or isn't true a section should be added to the article on this subject. 82.12.107.232 20:32, 20 December 2006 (UTC)
 * "mammals such as Pigeons"?

Production of CaC2 -Reaction of CaO and Carbon
To whoever changed the production reaction stoichiometry:-

The oxidation of carbon only proceeds to CO not CO2 according to Greenwood and Earnshaw. Axiosaurus 22:10, 15 November 2007 (UTC)

Smell
The article described calcium carbide as having 'a very unpleasant smell' - well maybe to some (perhaps most) people but it's a subjective matter. In fact I don't object to it - it reminds me of early caving trips, bringing back good memories - so I've changed it! Geopersona (talk) 05:23, 6 October 2011 (UTC)


 * The odor is fruity and quite pleasant. I suspect the smell is different because of different calcium sources. It was pretty much the same in several ex-USSR countries I visited though. The fact is, "unpleasant" shouldn't be in the article. 87.241.185.46 (talk) 00:40, 19 September 2022 (UTC)

Colorless?
The article describes pure calcium carbide as 'colorless'. What does this mean? Grey? White? Invisible? 140.180.190.89 (talk) 03:22, 13 November 2012 (UTC)

Color
I hope I can be of help being that I have a jar of Calcium carbide sitting directly in front of me. I have had this in my possession for 752 days stored at room temperature, 21 °C (70 °F), stored in a one quart mason jar, sealed in a 2 quart double zip lock freezer bag, 2.7 mills thick. The Calcium carbide's color, that I have, is dark brown. It would stay that way if I not open the jar. That is not the case. I have opened the jar 11 times for about 20 seconds. Each time the jar is opened the Calcium carbide is exposed to the common air that we breath. Which in turn causes the Calcium carbide to lighten in color. I now have before me a jar of Calcium carbide with the colors dark brown, mocha, walnut, tortilla along with just about any other shade of brown. I hope this sheds some light. Also, new to this. I apologize for my mistakes. Please feel free to correct and inform me.BRIAN A HUMPHREY (talk) 23:47, 22 December 2015 (UTC)

Dangers of eating fruit ripened by acethylene
Citations 18 and 19 regarding safety of eating fruits ripened with carbide are Irrelevant and misleading.

Good resources would be medical research and a publication in a known magazine.

Please remove this section or find a good resource. Gilhilel (talk) 01:14, 24 July 2018 (UTC)


 * Citation 18 is issued by a department of the government of India. Furthermore it details the fear of cross--contamination from industrial grade calcium carbide to foodstuffs which prima facie seems reasonable.

Carbide and steam
In 2014 a person identified only by an IP address put in an edit which was marked shortly after with "citation needed."

edited by 89.165.174.234 (talk) at 22:15, 2 October 2014

"It is worthy mentioning that, at high temperatures, the reaction between calcium carbide and water does not lead to acetylene, but to calcium carbonate, carbon dioxide and hydrogen gas. "

It was shortened to this

"At high temperatures, CaC2 reacts with water vapor to give calcium carbonate, carbon dioxide and hydrogen."

This did not seem obvious, so I went looking for a reference. Google found *many* but they were all cases where the Wikipedia page had been copied. So unreferenced information can flow out as well as in and the outflow makes finding cites difficult.

I finally went looking into books. Finally found this from 1903.

" . . . . at red heat steam acts very slowly upon carbide, evolving a mixture of acetylene and hydrogen in place of pure acetylene. (pg 51)

ACETYLENE: THE PRINCIPLES OF ITS GENERATION AND USE. F.H. LEEDS

1903

https://books.google.com/books?id=3Mykl7bl-0YC

I am not sure what to do here. Keith Henson (talk) 03:13, 13 October 2018 (UTC)