Science Memes

11004 readers

3026 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

Rules

Don't throw mud. Behave like an intellectual and remember the human.
Keep it rooted (on topic).
No spam.
Infographics welcome, get schooled.

This is a science community. We use the Dawkins definition of meme.

Research Committee

[email protected]

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 2 years ago

MODERATORS

[email protected]

1202

Burning Up (mander.xyz)

submitted 2 months ago by [email protected] to c/[email protected]

524 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 8 points 2 months ago (3 children)

It makes no sense because that's not what the 0 of the Fahrenheit scale is. The 0 point is the coldest an ammonium chloride brine mixture can be cooled to. The 90 point was an estimated average for human body temperature (it was adjusted up over time). These were chosen because the goal of the scale was to provide a way for people to have a defined temperature scale with a range and degree size that could be reliably reproduced without passing around standardized tools. 100 is really hot because human bodies were used as a reference for the high end, but the low end has nothing to do with the human body.

[–] [email protected] 2 points 2 months ago

Geometric construction plays a role in there as well: the 180 degrees between the boiling point and the freezing point of water was not accidental.

[–] [email protected] 2 points 2 months ago (1 children)

but like isn't that the whole point of celsius? all you need to calibrate a C thermometer is some water: when it starts freezing it's 0°C and when it's boiling it's 100°C, super simple and accessible.

It's not like "the estimated average human body temperature" is particularly accurate, and surely no matter what you mix into water it won't magically boil at the same temperature regardless of air pressure?

[–] [email protected] 1 points 2 months ago

You're totally correct that Celsius is the more sensible scale with easier to replicate reference points (when using water). It was also invented almost 30 years after the Fahrenheit scale and with all the insights gained from that period of technological advancement. In fact in the modern day the Celsius degree size is defined in reference to the Boltzmann constant since Celsius is essentially the Kelvin scale with the numbers moved around.

It also used 100 as the freezing point of water and 0 as the boiling point when originally proposed, which changed after Anders Celsius died because everyone knew that was a weird way to do it.

[–] [email protected] 1 points 2 months ago (1 children)

an ammonium chloride brine

At what molar concentration? Was it just as much NH4Cl as he could dissolve at ambient temperature and pressure?

[–] [email protected] 1 points 1 month ago

As I understand it, yes it was a saturated solution.