A sample of Freon-12 (CF2Cl2) occupies 25.5 L at 298 K and 153.3 kPa. Find its volume at STP.

1 answer:

6 0

35.8 L
According to the combined gas law: pV=nRT
p=pressure
V=volume
T=temperature in Kelvin
R=the universal gas constant
n=number of moles of the gas

Rearranging the equation: n= pV/RT
n=(153.3kPa)(25.5L)/R(298K)= 13.1/R
At STP (standard temperature and pressure) p=100kPa and T=273.15K.

Rearranging the equation again: V=nRT/p V=[(13.1/R)(R)(273.15K)]/100kPa = 35.8L

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