After Halotron is used to extinguish a lithium ion battery fire, the device must be cooled using ________ or another non-flammable liquid.

After Halotron is used to extinguish a lithium ion battery fire, the device must be cooled using ________ or another non-flammable liquid.

• A. Air
• B. Water
• C. Alcohol
• D. Dry ice

Answer: (B)

Cooling after extinguishing a lithium-ion battery fire is essential because the cells can remain hot and may reignite if heat isn’t removed. Halotron stops the flame by displacing oxygen and interrupting chemical reactions, but it doesn’t carry away the heat still stored in the battery. The goal is to reduce the battery temperature quickly to prevent thermal runaway from starting up again. Water is the best choice here because it has a high heat capacity and a high heat of vaporization, so it can absorb a large amount of energy as it heats and turns to steam. That rapid heat absorption cools the hot cells and helps prevent re-ignition, while also providing a convenient, non-flammable cooling medium. If water isn’t available, another non-flammable liquid with good cooling properties could be used, but among common options, water is the appropriate cooling agent. Air offers no meaningful cooling effect, alcohol is flammable and could fuel the fire, and dry ice isn’t a liquid and won’t provide sustained cooling.

Cooling after extinguishing a lithium-ion battery fire is essential because the cells can remain hot and may reignite if heat isn’t removed. Halotron stops the flame by displacing oxygen and interrupting chemical reactions, but it doesn’t carry away the heat still stored in the battery. The goal is to reduce the battery temperature quickly to prevent thermal runaway from starting up again.

Water is the best choice here because it has a high heat capacity and a high heat of vaporization, so it can absorb a large amount of energy as it heats and turns to steam. That rapid heat absorption cools the hot cells and helps prevent re-ignition, while also providing a convenient, non-flammable cooling medium. If water isn’t available, another non-flammable liquid with good cooling properties could be used, but among common options, water is the appropriate cooling agent. Air offers no meaningful cooling effect, alcohol is flammable and could fuel the fire, and dry ice isn’t a liquid and won’t provide sustained cooling.