User talk:2600:6C56:7E08:1EB6:9911:7BDF:663E:F18E

Dry Ice
There seems to be some confusion regarding the temperature of dry ice in the various temperature scales. I share the confusion with the Wiki article. Absolute zero or 0 Kelvins is -459.67 in Fahrenheit degrees or -273.16 in Celsius degrees. Dry ice sublimes at -78.5 Celsius degrees or -173.3 Fahrenheit degrees. Adjusting to Kelvins, dry ice sublimes at 194.65 kelvins in Celsius degrees or 286.37 Kelvins in Fahrenheit degrees. Your article on dry ice is reporting this in Celsius degrees. I have been changing it to Fahrenheit degrees. It was my understanding that, by convention, Kelvins are reported in Fahrenheit degrees. Upon further research, I understand that reporting Kelvins in Celsius degrees is acceptable, if not proper. To avoid such confusion, perhaps the Kelvins should be specified as reported in Celsius degrees. The conversion from –78.5 Celsius to -109.3 Fahrenheit is incorrect. The correct result is -173.3 Fahrenheit. The formula to convert Celsius to Fahrenheit is Celsius degrees times 9/5 plus 32. As an example, positive 78.5 degrees Celsius times 9/5 yields positive 141.3. Adding (increasing) that by 32 yields positive 173.3. When converting negative Celsius to negative Fahrenheit, the calculation is negative Celsius degrees 78.5 times 9/5 which yields negative 141.3. Increasing this (in the negative direction) by 32 results in negative 173.3. Your result, negative 109.3, results from adding a positive 32 back to the negative 141.3 instead of increasing (in a negative direction) by 32, which yields negative 173.3. I am unable to correct the reported Fahrenheit temperature as the conversion from Celsius to Fahrenheit is being done in the background, so to speak, by an incorrect formula, in that the adjustment by 32 is being misapplied. I hope that this clarifies my various attempts to change the reported temperatures at which dry ice sublimes.

John Clower