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Chapter 3: Q18-28DQ (page 610)

Hydrothermal vents are openings in the ocean floor that discharge very hot water. The water emerging from one such vent off the Oregon coast, 2400m below the surface, is at 279掳 C. Despite its high temperature, the water doesn鈥檛 boil. Why not?

Short Answer

Expert verified

The water doesn鈥檛 boil because it has not reached its boiling point at the corresponding pressure.

Step by step solution

01

Pressure variation with depth

With the increase in depth from the surface, the pressure keeps increasing. At the bottom of the ocean, the pressure will be maximum.

02

Reason for the water not boiling

In the atmospheric pressure (1 atm), the water boils at100掳C, but in the deep ocean, the pressure is far greater than 1 atm, which raises the boiling point.

Thus, the boiling point at the depth will be greater than 279掳C. Hence, boiling of the water does not occur at this temperature.

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