Water boils at 120 °C in a pressure cooker. Explain the reason - Noon Academy

Water boils at 120 °C in a pressure cooker. Explain the reason

Calorimetry | Class 10 | ICSE | Physics | Selina

Water boils at 120 °C in a pressure cooker. Explain the reason

Solution:

With increasing pressure, the boiling point of a liquid rises and falls with decreasing pressure. Pure water has a boiling point of 1000 degrees Celsius at one atmosphere of pressure. Steam is not permitted to escape from a pressure cooker. Inside the cooker, the vapour pressure rises to about 1.75 times that of the atmosphere. As a result of the increased pressure, water boils at around 1200 C to 1250 C.

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