September 29, 2024, 01:25:47 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Random Question  (Read 3487 times)

0 Members and 1 Guest are viewing this topic.

Offline havoc928

  • Very New Member
  • *
  • Posts: 1
  • Mole Snacks: +0/-0
Random Question
« on: August 25, 2009, 11:05:56 PM »
Are there any two chemicals that are safe and when are mixed together get cold rather quickly?
Logged

Offline nj_bartel

  • Sr. Member
  • *****
  • Posts: 1487
  • Mole Snacks: +76/-42
Re: Random Question
« Reply #1 on: August 26, 2009, 12:01:20 AM »
Safe how?
Logged

Offline Sam (NG)

  • Chemist
  • Full Member
  • *
  • Posts: 223
  • Mole Snacks: +12/-3
  • Gender: Male
  • Surface Modification
Re: Random Question
« Reply #2 on: August 26, 2009, 02:21:38 AM »
Acetic acid and sodium bicarbonate is endothermic.  Depends how cold you want to go.
Logged

Offline Arctic-Nation

  • Chemist
  • Full Member
  • *
  • Posts: 265
  • Mole Snacks: +33/-9
Re: Random Question
« Reply #3 on: August 26, 2009, 04:03:40 AM »
Crushed ice and sodium chloride. You can hardly get safer than that.
Logged

Offline Sam (NG)

  • Chemist
  • Full Member
  • *
  • Posts: 223
  • Mole Snacks: +12/-3
  • Gender: Male
  • Surface Modification
Re: Random Question
« Reply #4 on: August 26, 2009, 05:33:14 AM »
Quote from: Arctic-Nation on August 26, 2009, 04:03:40 AM
Crushed ice and sodium chloride. You can hardly get safer than that.

Depends, the chemicals themselves are harmless, but you're going to have a slurry at ~10 °C which could be considered a hazard for cold burns.

If you just use household vinegar and sodium bicarbonate, the risk with that reaction is minimal, I wasn't suggesting the use of glacial acetic acid or anything.
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links