AP Inquiry Experiment 12: The Hand Warmer Design Challenge
Central Challenge
You are challenged to use chemistry to design an effective, safe, environmentally benign, and inexpensive hand warmer. The ideal hand warmer increases in temperature by 20°C (but no more) as quickly as possible, has a volume of about 50 mL, costs as little as possible to make, and uses chemicals that are as safe and environmentally friendly as possible. Students will carry out an experiment to determine which substances…
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