t/takeCovalentActivity do?locator assignment-take Use the References to access i

Question

t/takeCovalentActivity do?locator assignment-take Use the References to access important values if needed for this question. The vapor pressure of liquid acetone,CHscoCHa, is 100 mm Hg at 281 K AS32x10 g sample of liquid CHscoCHs is placed in a closed, evacuated 390. mL container at a temperature of 281 K. Assuming that the temperature remains constant, will all of the liquid evaporate? What will de pressure in the container bewben equilibrium is reached? mm Hg Retry Entire Group 2 more group attempts remaining

Explanation / Answer

Find Pressure if the sample was total gas:

PV = nRT

P = nRT/V

MW of acetone =58.08 g/mol

mol = mass/MW = (8.32*10^-2)/(58.08 ) = 0.001432

so

P = (0.001432)(0.082*281)/(390*10^-3) = 0.0846054 atm

change to mm Hg --> 0.0846054*760 = 64.30 mm Hg

since this is LOWER... this will remain as a GAS/VAPOR 100%

the pressure will be then 64.30 mm Hg in the container

Q2

Relate Pressures:

P1V1 = P2V2

508*62 = P2*386

P2 = 508*62/386 = 81.595 mm Hg

since it is still < vapor pressure

this will remain as vapor 100%

P =

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