Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Chemistry Lab Help!

  1. Nov 8, 2008 #1
    1. The problem statement, all variables and given/known data
    Which salt will make the best hot pack when combined with water?

    Independent variable: Salt
    Dependent variable: Temperature

    In the experiment I have a 50 ml beaker of water and I measure the initial temperature of the water. It was 24.5 degrees Celsius. I then add 10g of Sodium Chloride (table salt) to the same beaker. Now my question is will the temperature increase, decrease, or stay the same as the initial temperature of water.

    I also did the same for two other salts: Ammonium Chloride and Calcium Chloride. The temperature of the water was 25 degrees Celsius for both of these salts. When I add the Ammonium Chloride and Calcium Chloride will the temperature stay the same, increase, or decrease?

    Any help would be appreciated.
  2. jcsd
  3. Nov 8, 2008 #2


    User Avatar

    Staff: Mentor

    I don't understand the situation. You have measured initial temperature - it was 24.5 deg C. You have added salt. Next logical step is not asking the on the forums "what will happen", but measuring the temperature for the second time.

    Ditto for the other two salts.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook