The vapor pressure of water at 20°C is 2330 Pa. Suppose that you build a barometer that uses water as its working fluid instead of mercury. What would the height of the column of water be when the external pressure is 101 kPa and the water temperature is 20°C?

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Quizplus · Accepted Answer

The height of the water column is given by:h = (P_ext - P_vap) / (rho * g)where:P_ext is the external pressure (101 kPa)P_vap is the vapor pressure of water at 20°C (2330 Pa)rho is the density of water at 20°C (998 kg/m^3)g is the acceleration due to gravity (9.81 m/s^2)Plugging in the values, we get:h = (101 kPa - 2330 Pa) / (998 kg/m^3 * 9.81 m/s^2) = 10.1 m

The Vapor Pressure of Water at 20°C Is 2330 Pa