Final answer:
To calculate the amount of sodium thiosulfate pentahydrate needed to store enough energy for one day, we need to determine the enthalpy change of the substance.
Step-by-step explanation:
The subject of this question is Chemistry. The student is asking how many grams of sodium thiosulfate pentahydrate would be needed to store enough energy for one day, based on heat of fusion data. The heat of fusion is the amount of heat per gram (or per mole) required for a phase change that occurs at the melting point. To determine the total heat being transferred for melting or solidification, we can use the heat of fusion value.
Based on the given data, we would need the enthalpy change of sodium thiosulfate pentahydrate (answer choice a) to calculate the amount of energy required to store for one day.