Final answer:
Four gallons of water will boil at 100 degrees Celsius, just like 1 gallon, because the boiling point is an intensive property and does not vary with the quantity of water.
Step-by-step explanation:
The boiling point of water remains at 100 degrees Celsius (Cº) regardless of the quantity of water being heated, as long as the pressure is constant at 1 atm. This is because the boiling point is an intensive property, which means it does not change with the amount of the substance.
Therefore, 4 gallons of water will boil at 100 degrees Celsius (Cº) because the boiling point is an intensive property, not an extensive property that would depend on the amount of water.This principle underscores the consistency of the boiling point, affirming that whether dealing with a small quantity or a larger volume, water boils at 100 degrees Celsius under standard atmospheric pressure, highlighting the robust nature of intensive properties in defining a substance's behavior.