Water is capable of carrying approximately _______________ times more heat than an equal volume of air.

Water is capable of carrying approximately _______________ times more heat than an equal volume of air.

• A. 1000 times
• B. 2000 times
• C. 5000 times
• D. 3500 times

Answer: (D)

Water has a much higher volumetric heat capacity than air, meaning it stores and can move far more heat per unit volume for the same temperature change. One liter of water needs about 4.18 kJ to raise by 1°C, while one liter of air requires only about 1.2 J to raise by 1°C. That puts water at roughly 3,400 to 3,500 times more heat per volume than air. So saying water can carry about 3,500 times more heat per equal volume than air is the best answer. This big difference is why water is so effective for cooling and energy transfer in firefighting.

Water has a much higher volumetric heat capacity than air, meaning it stores and can move far more heat per unit volume for the same temperature change. One liter of water needs about 4.18 kJ to raise by 1°C, while one liter of air requires only about 1.2 J to raise by 1°C. That puts water at roughly 3,400 to 3,500 times more heat per volume than air. So saying water can carry about 3,500 times more heat per equal volume than air is the best answer. This big difference is why water is so effective for cooling and energy transfer in firefighting.