 
 <prompt> Which one of di following no be trait of paraffin wax: cheap, high specific heat capacity, or easy to find? Given di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Phase change materials like paraffin wax and Glauber's salt na anoda thermal storage media. Dis materials dey cheap, easy to find, and fit deliver useful temperatures (approximately 64 °C or 147 °F). The "Dover House" (for Dover, Massachusetts) na di first wey use Glauber's salt heating system, for 1948. Solar energy fit also dey store for high temperatures using molten salts. Salts dey effective as storage medium because dem dey cheap, get high specific heat capacity, and fit deliver heat at temperatures wey dey compatible with conventional power systems. The Solar Two use dis method of energy storage, wey allow am store 1.44 terajoules (400,000 kWh) for im 68 cubic metres storage tank with an annual storage efficiency of about 99%. 