Before completing the "How Do Hot Packs and Cold Packs Change Temperature?" simulation below, watch the following video: youtu.be/nX5qhQwRP08
Questions:

• What materials were used in a hot pack and/or cold pack?
• What do you notice occurring when the following chemicals are used in a hot pack or cold pack?
  • sodium chloride
  • lithium chloride
  • sodium hydroxide
  • potassium chloride
• What do you notice occurring with the anions (negative ions) and cations (positive ions)?