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[solution] » A 50.0 g piece of CO2(s) (i.e. "dry ice") is sealed inside

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A 50.0 g piece of CO2(s) (i.e. "dry ice") is sealed inside
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A 50.0 g piece of CO2(s) (i.e. ?dry ice?) is sealed inside a0.250 L container held at 20°C. Based on the phase diagram of CO2(Figure 11.42 in the textbook), what state(s) of matter are present inside the container?


T = 20 oC = (273+20)K = 293 K

 

V = 0.25 L

 

Mass of CO2 = 50 g

 

molar mass of CO2= 12+2*16 gm = 44 gm

 

number of moles of CO2, n = mass/molar mass = 50/44 = 1.14 mol

 

use:

 

P*V = n*R*T

 

P*0.25 = 1.14*...

 







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