Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
|
What temperature does water boil at?
|
Ste
Premium Member
Registered: 5th Mar 03
Location: Taif, Saudi Arabia
User status: Offline
|
Depends.
You need to give more specifics if you want the correct answer
purity? pressure? etc
I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.
|
Ste
Premium Member
Registered: 5th Mar 03
Location: Taif, Saudi Arabia
User status: Offline
|
Also how accurate/ how many decimal places in degrees C or kelvin etc
I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.
|
Ste
Premium Member
Registered: 5th Mar 03
Location: Taif, Saudi Arabia
User status: Offline
|
You may as well asked how long a piece of string is
I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.
|
Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
|
well, you'd expect the answer on google to be the generic one, at sea level, at one atmosphere and pure.
|
Tomnova16
Premium Member
Registered: 21st Jan 06
Location: Gerrards Cross Drives: Porsche 911
User status: Offline
|
stephen fry told me but i cant remember, its around 90 degrees c though i think
http://www.lemass.co.uk/ for all your automotive/bodyshop needs
Located in Chalfont st Peter
|
Jay
Member
Registered: 26th Sep 04
Location: Liverpool
User status: Offline
|
Just under 100 degrees can't remember exactly
|
Ste
Premium Member
Registered: 5th Mar 03
Location: Taif, Saudi Arabia
User status: Offline
|
I could make water boil at room temperature just with things in my house. Didn't you go to school?
I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.
|
Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
|
Ste, don't be a cock.
I'm asking a question because the answer on google is different to my understanding, the reason I googled it is to find a conversion into Kelvin and 100 degrees seemed like a good point to start, not because I'm an idiot.
|
Ste
Premium Member
Registered: 5th Mar 03
Location: Taif, Saudi Arabia
User status: Offline
|
I'm not being a cock. You asked an unanswerable question given the parameters you supplied.
I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.
|
Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
|
I see your point but at school you are taught that water freezes at 0c and boils at 100c
That was my understanding and as far as I was aware, Celsius used water to define his scale, 0 being freezing point and 100 being boiling point as water was easy to find and they were good numbers to work with.
So, how come water actually boils at 99.98 Celsius? That's my point.
I know there are other factors involved but if you ask most people, they'll say 100 degrees, which is correct.
|
Ste
Premium Member
Registered: 5th Mar 03
Location: Taif, Saudi Arabia
User status: Offline
|
I was taught pressure was more relevant, but hey, that's our education system.
Found this chart which will help
A cool experiment is getting a syringe (no needle on it) put a small amount of water in it, put your finger over the hole and pull back fast, the drop in pressure will cause it to boil and you will see steam bubbles in the water.
I would rather lose by a mile because i built my own car, than win by an inch because someone else built it for me.
|
neil h
Member
Registered: 28th Sep 06
User status: Offline
|
quote:
Originally posted by Robin
So, how come water actually boils at 99.98 Celsius? That's my point.
I'd happily right off 0.02% as an acceptable margin of error. That could easily be a variance in the calibration of the test equipment.
|
Jay
Member
Registered: 26th Sep 04
Location: Liverpool
User status: Offline
|
Robin asked a general question so assumed he would want a general answer?
|
nibnob21
Premium Member
Registered: 16th May 10
Location: South Derbyshire
User status: Offline
|
quote:
Originally posted by Robin
Ste, don't be a cock.
I'm asking a question because the answer on google is different to my understanding, the reason I googled it is to find a conversion into Kelvin and 100 degrees seemed like a good point to start, not because I'm an idiot.
In case you don't have the answer already, 0degC is 273K. They use the same scale, so 100degC is 373K etc.
Kelvin starts from absolute zero. So 0K is -273degC.
[Edited on 09-08-2013 by nibnob21]
MX5 Project Thread
|
3CorsaMeal
Member
Registered: 11th Apr 02
User status: Offline
|
Whenever the bubbles are quite a lot, thats when its ready imo, no need to know the temperature
|
Tomnova16
Premium Member
Registered: 21st Jan 06
Location: Gerrards Cross Drives: Porsche 911
User status: Offline
|
the praying mantis lobster moves so quickly it boils the water infront of it.
http://www.lemass.co.uk/ for all your automotive/bodyshop needs
Located in Chalfont st Peter
|
John
Member
Registered: 30th Jun 03
User status: Offline
|
Celsius lived until 1744, if he was only .02 out I'd say he was close enough with his scale. Most instruments probably aren't that accurate even now.
|
Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
|
How can he be out though, he defined the scale!
|
John
Member
Registered: 30th Jun 03
User status: Offline
|
He still needed a thermometer (or some other instrument) that visually showed the changes in temperature. His scale is separate to that.
If that was the cause (I've not had time to check if it was), then being only .02 out, with instruments from 300 years ago, that's not bad.
|
Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
|
I think my point is being missed.
|
Balling
Premium Member
Registered: 7th Apr 04
Location: Denmark
User status: Offline
|
quote:
Originally posted by John
He still needed a thermometer (or some other instrument) that visually showed the changes in temperature.
Technically he didn't need to measure anything.
If he decided that 0 was freezing and 100 was boiling points of water at sea level, then that's the way it is. There's no way to say he was off as he assigned those numbers based on the physical state of the matter.
By his definition, if pure water starts boiling at sea level, then it's 100 degrees warm.
I see where Robin is coming from.
|
Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
|
Yeah, that's exactly what I meant.
|
John
Member
Registered: 30th Jun 03
User status: Offline
|
I think you 2 are missing the point.
How did he measure those changes?
All very well defining the scale but you need something to measure it.
As it was able to be more accurately measured, it turns out that his 100 degrees was actually .02 above.
You need something to take measurements whether you are using Celsius or furlongs.
|
John
Member
Registered: 30th Jun 03
User status: Offline
|
I also see what you are saying btw, but disagree with that being what matters here.
If all he done wqas say water boils at 100 and freezes at 0, you can see one turning to a solid and one turns to a gas, but that's not all it measures.
|
