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Carbon dioxide was one of the good articles, but it has been removed from the list. There are suggestions below for improving the article to meet the good article criteria. Once these issues have been addressed, the article can be renominated. Editors may also seek a reassessment of the decision if they believe there was a mistake. | ||||||||||||||||||||||
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To-do list for Carbon dioxide:
From ACID nomination:
The Fire Extinguisher Entry is outdated and wrong. CO2 IS toxic at concentrations higher than 5%. Design Concentrations for Room Flooding systems with CO2 are 40%+ so CO2 is not suitable for occupied spaces. CO2 Flooding Systems are not supported for use in occupiable spaces though many countries such as USA and other third world countries still misuse CO2 in Fire Suppression Systems because it is cheap. The NFPA supports the use of CO2 on electrical hazards though it is not supported globally because CO2 can cause over pressurization, thermal shock, electrical component damage and has human health/toxicity issues. The NFPA organisation is not the definitive word/authority on Fire Suppression it is just one of many organisations involved in making standards for Fire Protection. The NFPA is really relevent only to the USA. USA codes and standards are typically only relevent to the USA so should not be referenced as the main global Fire standard on a site like wiki which serves a global audience (unless wiki is only for Americans). Though CO2 was used many years ago to protect enclosed spaces on Ships, this is extremely outdated. CO2 has caused fatalities on ships in Navies and merchant fleets that it is now superceded in this application by using extinguishants that support human life at design concentrations such as HFC-227 or Novec-1230. Unlike other countries, America and other third world countries still allow the use of CO2 in some applications where humans can be present because CO2 is cheap and installations are not monitored/controlled. (~GRANT) |
The
contentious topics procedure applies to this page. This page is related to
climate change, which has been
designated as a contentious topic. Editors who repeatedly or seriously fail to adhere to the purpose of Wikipedia, any expected standards of behaviour, or any normal editorial process may be blocked or restricted by an administrator. Editors are advised to familiarise themselves with the contentious topics procedures before editing this page. |
I have corrected the conversion of ppm by volume to ppm by mass. The original note claims that this conversion could be performed by multiplying by the ratio of the molecular masses of CO2 and Air. The correct equation multiplies by the ratio of the densities of CO2 and Air. The difference between the density of moist air and the density of dry air is a non-trivial factor, and so volume can not be disregarded. A quick dimensional analysis will confirm that this is the correct method:
(m/m)=(v/v)(m/v)(v/m)
Or to be more explicit: mCO2/mAir = (vCO2/vAir) (vAir/mAir) (mCO2/vCO2)
Taking this approach usually gets you a ppm-m that is about 1.9 times greater than the ppm-v.
https://www.lenntech.com/calculators/ppm/converter-parts-per-million.htm — Preceding unsigned comment added by 172.97.206.190 ( talk • contribs) 00:12, 8 November 2020 (UTC)
I came to this page trying to figure out an answer to the question "hey, my sensor is saying i have 1500ppm in the office, is that good or bad? what's the impact?" I eventually found the "below 1%" section buried in the article, and even there it's one long paragraph with lots of data.
I figured I would build a shorter summary of the data in a table. I picked some new sources for the data which might not be the best, but it's all sourced. One source might be a little dubious because it's from a sensor manufacturer which may have incentives to describe co2 levels are more alarming than the research actually says they are, but I figured this was still worthwhile, especially considering Canada (and other countries!) restrictions above 1000 ppm.
HTH! TheAnarcat ( talk) 15:45, 10 August 2023 (UTC)
Some values have (15) or (30) added - that needs explaining or correction eg. Vapor pressure 5.7292(30) MPa, 56.54(30) or Critical point (T, P) 304.128(15) K (30.978(15) °C), 7.3773(30) MPa (72.808(30) atm) 2A01:C22:CD7C:E00:7983:CA1C:9736:D1BC ( talk) 08:44, 24 August 2023 (UTC)
There are many data with ambiguous units of measurement like " ppm" and "%" across this article (and many other articles across Wikipedia), without a clear explanation what those units stand for. Without a clear explanation, those units can stand for mass per volume, volume per volume, mole per mole or who knows what else. Can someone clarify what those units stand for, despite that is not clarified in the sources? The data about the concentrations of carbon dioxide (and other suffocating and toxic gases and substances) in the air, water, food, drinks, products, etcetera, is a very important information for readers, especially non-expert ones, so, editors should be notified about the very existence of the ambiguous "ppm", "%" and similar ambiguous units across Wikipedia. Let's discuss. I am opening a debate. What do you think? Do you agree or disagree with me, and explain why. Thanks in advance for your opinion. Bernardirfan ( talk) 18:08, 30 August 2023 (UTC)
This
edit request has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
2.49.118.238 ( talk) 14:49, 31 August 2023 (UTC)
But if he das he Eed yt account then I don’t see why not just follow the link to the tweet he is posting and
This is the
talk page for discussing improvements to the
Carbon dioxide article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
Archives: Index, 1, 2, 3, 4Auto-archiving period: 30 days |
This article is written in American English, which has its own spelling conventions (color, defense, traveled) and some terms that are used in it may be different or absent from other varieties of English. According to the relevant style guide, this should not be changed without broad consensus. |
Carbon dioxide was one of the good articles, but it has been removed from the list. There are suggestions below for improving the article to meet the good article criteria. Once these issues have been addressed, the article can be renominated. Editors may also seek a reassessment of the decision if they believe there was a mistake. | ||||||||||||||||||||||
|
This
level-3 vital article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
To-do list for Carbon dioxide:
From ACID nomination:
The Fire Extinguisher Entry is outdated and wrong. CO2 IS toxic at concentrations higher than 5%. Design Concentrations for Room Flooding systems with CO2 are 40%+ so CO2 is not suitable for occupied spaces. CO2 Flooding Systems are not supported for use in occupiable spaces though many countries such as USA and other third world countries still misuse CO2 in Fire Suppression Systems because it is cheap. The NFPA supports the use of CO2 on electrical hazards though it is not supported globally because CO2 can cause over pressurization, thermal shock, electrical component damage and has human health/toxicity issues. The NFPA organisation is not the definitive word/authority on Fire Suppression it is just one of many organisations involved in making standards for Fire Protection. The NFPA is really relevent only to the USA. USA codes and standards are typically only relevent to the USA so should not be referenced as the main global Fire standard on a site like wiki which serves a global audience (unless wiki is only for Americans). Though CO2 was used many years ago to protect enclosed spaces on Ships, this is extremely outdated. CO2 has caused fatalities on ships in Navies and merchant fleets that it is now superceded in this application by using extinguishants that support human life at design concentrations such as HFC-227 or Novec-1230. Unlike other countries, America and other third world countries still allow the use of CO2 in some applications where humans can be present because CO2 is cheap and installations are not monitored/controlled. (~GRANT) |
The
contentious topics procedure applies to this page. This page is related to
climate change, which has been
designated as a contentious topic. Editors who repeatedly or seriously fail to adhere to the purpose of Wikipedia, any expected standards of behaviour, or any normal editorial process may be blocked or restricted by an administrator. Editors are advised to familiarise themselves with the contentious topics procedures before editing this page. |
I have corrected the conversion of ppm by volume to ppm by mass. The original note claims that this conversion could be performed by multiplying by the ratio of the molecular masses of CO2 and Air. The correct equation multiplies by the ratio of the densities of CO2 and Air. The difference between the density of moist air and the density of dry air is a non-trivial factor, and so volume can not be disregarded. A quick dimensional analysis will confirm that this is the correct method:
(m/m)=(v/v)(m/v)(v/m)
Or to be more explicit: mCO2/mAir = (vCO2/vAir) (vAir/mAir) (mCO2/vCO2)
Taking this approach usually gets you a ppm-m that is about 1.9 times greater than the ppm-v.
https://www.lenntech.com/calculators/ppm/converter-parts-per-million.htm — Preceding unsigned comment added by 172.97.206.190 ( talk • contribs) 00:12, 8 November 2020 (UTC)
I came to this page trying to figure out an answer to the question "hey, my sensor is saying i have 1500ppm in the office, is that good or bad? what's the impact?" I eventually found the "below 1%" section buried in the article, and even there it's one long paragraph with lots of data.
I figured I would build a shorter summary of the data in a table. I picked some new sources for the data which might not be the best, but it's all sourced. One source might be a little dubious because it's from a sensor manufacturer which may have incentives to describe co2 levels are more alarming than the research actually says they are, but I figured this was still worthwhile, especially considering Canada (and other countries!) restrictions above 1000 ppm.
HTH! TheAnarcat ( talk) 15:45, 10 August 2023 (UTC)
Some values have (15) or (30) added - that needs explaining or correction eg. Vapor pressure 5.7292(30) MPa, 56.54(30) or Critical point (T, P) 304.128(15) K (30.978(15) °C), 7.3773(30) MPa (72.808(30) atm) 2A01:C22:CD7C:E00:7983:CA1C:9736:D1BC ( talk) 08:44, 24 August 2023 (UTC)
There are many data with ambiguous units of measurement like " ppm" and "%" across this article (and many other articles across Wikipedia), without a clear explanation what those units stand for. Without a clear explanation, those units can stand for mass per volume, volume per volume, mole per mole or who knows what else. Can someone clarify what those units stand for, despite that is not clarified in the sources? The data about the concentrations of carbon dioxide (and other suffocating and toxic gases and substances) in the air, water, food, drinks, products, etcetera, is a very important information for readers, especially non-expert ones, so, editors should be notified about the very existence of the ambiguous "ppm", "%" and similar ambiguous units across Wikipedia. Let's discuss. I am opening a debate. What do you think? Do you agree or disagree with me, and explain why. Thanks in advance for your opinion. Bernardirfan ( talk) 18:08, 30 August 2023 (UTC)
This
edit request has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
2.49.118.238 ( talk) 14:49, 31 August 2023 (UTC)
But if he das he Eed yt account then I don’t see why not just follow the link to the tweet he is posting and