if the solubility of caffeine in water is 2.2 mg/ml at 25 °c,180 mg/ml at 80 °c, and 670 mg/ml at 100 °c, explain why the first step in the separation is to heat the ground up tablets.

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)