1. Liquid carbon tetrachloride has a density of 1.59 g/mL. A barometer is constr
ID: 891819 • Letter: 1
Question
1. Liquid carbon tetrachloride has a density of 1.59 g/mL. A barometer is constructed using carbon tetrachloride instead of mercury. If the atmospheric pressure is0.972 atm, what is the height of the carbon tetrachloride column in the barometer in cm?
The density of liquid mercury is 13.6 g/mL.
______ cm
2. A sample of neon gas at a pressure of 0.917 atm and a temperature of 21.8 °C, occupies a volume of 627 mL. If the gas is allowed to expand at constant temperature until its pressure is 0.679 atm, the volume of the gas sample will be _______mL.
3. A sample of xenon gas at a pressure of 0.817 atm and a temperature of 25.5 °C, occupies a volume of 762 mL. If the gas is compressed at constant temperature until its pressure is 1.27 atm, the volume of the gas sample will be _______mL.
Explanation / Answer
1. using the following relation: 1 atm = 76 cm Hg-------------- 0.972 atm = 73,872 cm Hg
Hg= 13.6 g/ml = 73, 872 cm
CCl4= 1.59 g/ml = X cm
a rule af three= 8.63 cm
2. P1V1/T1=P2V2/T2 ;
P1= 0.971; V1= 627 mL; T1= 21.8C or 294.8 K
P2= 0.679; V2= ? ;T2=21.8C or 294.8 K
0.971x627/294.8=0.679x V2/294.8
V2= 896.63 ml
3. P1V1/T1=P2V2/T2
P1= 0.871; V1= 762; T1= 25.5 C or 298.5 K
P2= 1,27; V2= ?; T2= 25.5 C or 298.5 K
0.871x762/298.5=1.27xV2/298.5
V2= 522.6 mL
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