6- 1CHAPTER SIX 6.1a. AB: Heat liquid - -constantV≈BC: Evaporate liquid - - increases, system remains at point on vapor - liquid equilibriumcurve as long as some liquid is present. C.oVT=100CD: Heat vapor - -T increases, V increases . b.Point B: Neglect the variation of the density of liquid water with temperature, so ρ= 1.00 g/mL Band 10 mLV=Point C: H2O (v, 100°C) 10 mL1.00 g1 mol0.555 molmL 18.02 gn==0.555 mol 0.08206 L atm 373 K17 L1 atmmol KCCCCCCnRTPVnRTVP⋅=⇒===⋅6.2a.mm HgfinalP=243. Since liquid is still present, the pressure and temperature must lie on the vapor-liquid equilibrium curve, where by definition the pressure is the vapor pressure of the species at the system temperature.
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