The document describes how to make a homemade hot pack using sodium acetate. It begins by discussing the benefits of hot and cold therapy for pain relief. The objectives are to provide information on how heat can be stored using sodium acetate and how this can save money compared to store-bought heating pads. The experiment observes the chemical reaction between vinegar and baking soda, and recommends using more of these materials to fully complete the crystallization process. In conclusion, the homemade packs are as effective as store-bought options and can help people who cannot afford fast remedies for muscle pain.