The vapor pressure of a liquid is the pressure exerted by its vapor when the liq
ID: 784769 • Letter: T
Question
The vapor pressure of a liquid is the pressure exerted by its vapor when the liquid and the vapor states are in equilibrium. The relationship between vapor pressure and temperature is expressed by the Clausius-Clapeyron equation, where P1 and P2 are the vapor pressure at the absolute temperatures T1 and T2, respectively, delta H vap is the heat vaporization of the substance in joules per mole, and R is the ideal gas constant, which is equal to 8.3145 J/mol*K. The heat vaporization of water is 4.07810^4 J/mol. The instruction booklet for your pressure cooker indicates that its highest setting is 13.1psi. You know that what temperature in degrees Celsius will your food cook in this pressure cooker set on "high"? Express your answer numerically in degree Celsius.Explanation / Answer
pressure becomes 27.8 psi,
14.7 +13.1 = 27.8
----------so using the referenced chart, the food would be cooking at approximately 246 deg F, or 119 deg C.
Sources:http://www.engineeringtoolbox.com/boiling-point-water-d_926.html
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