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# set4 - CHE 303 Problem set#4 LAST NAME FIRST 1 What...

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CHE 303 __________________ LAST NAME, FIRST Problem set #4 1) What pressure is needed to isothermally compress ice initially at - 5 o C and 1 bar so that it changes phase? At 0 ºC and 1 bar water density is 1000 kg/m 3 and ice density is 917 kg/ m 3 . Also at 0 ºC and 1 bar, l s h h - = 6010 J/mol. 2) One mole of a pure species exists in liquid-vapor equilibrium in a rigid container of volume V = 1 L, a temperature of 300 o K, and a pressure of 1 bar. The enthalpy of vaporization and the second virial coefficient in the pressure expansion are: h vap = 16,628 [J/mol] and B’ = - 1 × 10 -7 [m 3 /J] Assume the enthalpy of vaporization does not change with temperature. You may neglect the molar volume of the liquid relative to that of the gas. (a) How many moles of vapor are there? (b) This container is heated until the pressure reaches 21 bar and is allowed to reach equilibrium. Both vapor and liquid phases are still present. Find the final temperature of this system. At this pressure you need to use the viral equation of state given by

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set4 - CHE 303 Problem set#4 LAST NAME FIRST 1 What...

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