Question

amount of the substance changes. this is because characteristic properties depend only on the substances chemical structure. one characteristic property of a substance is its melting point. melting point is the temperature at which a substance changes from solid to liquid. the melting point of a substance is higher when its molecules are more strongly attracted to one another. the strength of these attractions depends on the substances chemical structure. the following passage describes a person making soap through saponification. sam is making soap at home using the saponification reaction. her soap recipe uses coconut oil. the melting point of coconut oil is 76°f. sam is making the soap in her kitchen, where the temperature is currently 82°f. which of the following statements are true? select all that apply. because the temperature in sams kitchen is higher than the melting point of the coconut oil, the coconut oil is a liquid. a substances melting point is higher when the attractions between its molecules are stronger. a large amount of coconut oil has a higher melting point than a small amount of coconut oil.

Explanation:

1. For the first statement: The melting point of coconut oil is 76°F, and the kitchen temperature is 82°F, which is above the melting point. A substance is liquid when the temperature is above its melting point, so this is true.
2. For the second statement: The text explicitly states that the melting point of a substance is higher when its molecules are more strongly attracted to one another, so this is true.
3. For the third statement: The text notes that characteristic properties like melting point depend only on the substance's chemical structure, not the amount of the substance. So this is false.

Answer:

• Because the temperature in Sam's kitchen is higher than the melting point of the coconut oil, the coconut oil is a liquid.
• A substance's melting point is higher when the attractions between its molecules are stronger.