Answer :
Final answer:
The most reasonable temperature reached by thermal masks containing crystals of gypsum, considering human skin temperature and safety requirements, is 1) approximately 105 degrees Fahrenheit.
Explanation:
The question concerns the temperature reached by thermal masks containing crystals of gypsum. According to the descriptions of thermal behavior and responsive materials like liquid crystal thermometers, which change color at specific temperatures, we can infer that thermal masks containing crystals like gypsum might be designed to operate within a safe temperature range for human skin. Human skin has a typical temperature of approximately 308 K (about 35°C or 95°F). Considering the function and safety requirements of thermal masks, a temperature too far above this could cause discomfort or harm, whereas a temperature significantly below wouldn't be effective. Therefore, amongst the given options, approximately 105 degrees Fahrenheit is the most reasonable temperature that could be reached by thermal masks containing crystals of gypsum to ensure efficacy while maintaining safety.
