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31 March, 00:16

A mass of 5 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 125 kPa. Initially, 2 kg of the water is in the liquid phase and the rest is in the vapor phase. Heat is now transferred to the water, and the piston, which is resting on a set of stops, starts moving when the pressure inside reaches 300 kPa. Heat transfer continues until the total volume increases by 20 percent.

Determine:

(a) the initial and final temperatures,

(b) the mass of liquid water when the piston first start moving

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  1. 31 March, 03:26
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    A because it is the best one
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