Water in a car radiator sometimes boils explosively when the radiator cap is removed, which is due to sudden
A)rapid evaporation.
B)reduced pressure.
C)excess condensation.
D)excess vaporization.

Question

Quizplus · Accepted Answer

When the radiator cap is removed, the pressure above the water decreases suddenly. Water boils at a lower temperature under lower pressure, so the water that was just below boiling point under the higher pressure can suddenly boil when the pressure drops, leading to rapid boiling or an explosive effect.

Water in a Car Radiator Sometimes Boils Explosively When the Radiator