[sclug] Sclug Digest, Vol 30, Issue 1

[Ian Park]

... unless the physics is nu^H^Hunclear ... ;-)

Ian 


  Original Message  
From: sclug at sclug.org.uk
Sent: 15 September 2017 9:32 a.m.
To: cascade.information at gmail.com; sclug at sclug.org.uk
Reply to: insecure.email at virgin.net
Subject: Re: [sclug] Sclug Digest, Vol 30, Issue 1

Hey Graham,

I stand corrected. Can't argue with Physics :-)

Matt

-----Original Message-----
From: Graham via Sclug <sclug at sclug.org.uk>
Reply-to: Graham <cascade.information at gmail.com>
To: sclug at sclug.org.uk
Subject: Re: [sclug] Sclug Digest, Vol 30, Issue 1
Date: Thu, 14 Sep 2017 01:23:38 +0100

Warm salt-free non-beer in the northern hemisphere

"" The heat of fusion for water at 0 °C is approximately 334 joules
(79.7 calories) per gram, and the heat of vaporization at 100 °C is
about 2,230 joules (533 calories) per gram.
""

2230 is vapour (this is where we were going wrong)
2230/4.184 = 533 (interesting but not relevent)

334 is fusion
4.184 is specific heat of water per 'K per gram etc etc
334 / 4.184 = 79.83

so melting ice absorbs 80'C of water heat

https://www.britannica.com/science/latent-heat
https://en.wikipedia.org/wiki/Latent_heat
https://water.usgs.gov/edu/heat-capacity.html

Graham