Cold water warm water boiling water and saline water which is the better fire extinguisher
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Which extinguishes fire more quickly, hot or cold water? Why?
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Swastic Singh, Manager-Technical Services at Reliance Industries Limited
Answered Mar 16, 2015
To sustain fire you need three things: fuel, heat and oxygen.Taking cold water means it will raise its temperature say from 20°C to 100°C which requires heat energy of 80 calories per gm and then change its state which requires 540 calories per gm. But with hot water (temperature around 100°C) which only changes its state with 540 calories per gm. So, we can see that the latent heat of vaporization will dominate the heat necessary to elevate cold water of a given temperature to some higher temperature. But apart from that water works as asphyxiant( pushing away atmospheric oxygen).When the water changes into vapor, it try to rise above air as it is lighter than air, so it forms a blanket of water vapor which pushes the coming oxygen. So now by joining both facts we can say that hot water might be more effective
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9 ANSWERS

Swastic Singh, Manager-Technical Services at Reliance Industries Limited
Answered Mar 16, 2015
To sustain fire you need three things: fuel, heat and oxygen.Taking cold water means it will raise its temperature say from 20°C to 100°C which requires heat energy of 80 calories per gm and then change its state which requires 540 calories per gm. But with hot water (temperature around 100°C) which only changes its state with 540 calories per gm. So, we can see that the latent heat of vaporization will dominate the heat necessary to elevate cold water of a given temperature to some higher temperature. But apart from that water works as asphyxiant( pushing away atmospheric oxygen).When the water changes into vapor, it try to rise above air as it is lighter than air, so it forms a blanket of water vapor which pushes the coming oxygen. So now by joining both facts we can say that hot water might be more effective
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