1. If a chemical cold pack weighing 28grams and at a temperature of -2C was left in a 25C room for 3 days, what would be the final temperature of the pack?
2. I have a lab experiment where I was used Styrofoam cup with deionized water for the purpose to measure temperature of the metal which previously was boiled for 5min. Instead of a Styrofoam cup, suggest a suitable replacement which can be used as a calorimeter?
3. How would the results for atomic weight have differed if the hot water was never brought to a boil?© BrainMass Inc. brainmass.com October 9, 2019, 6:46 pm ad1c9bdddf
This sounds like an interesting thermochemistry laboratory.
Your final temperature would be the room temperature given enough time, and 3 days seems like it would be long enough (depending on the capacity of the cold pack of course).
If you were using a styrofoam cup as your calorimeter, you are a little low tech, ...
The solution discusses the differences in atomic weight based on temperature of water that the ions sit in in the context of a lab experiment (three different questions are answered).