28.32 litres of chlorine were liberated at NTP. Calculate the volume of the gas at 12°C and 780mm pressure?

No. of moles at NTP, n= PVRT
R= 0.082055 L atm mol-1 K-1
V= 28.32 L
T = 293 K
P = 1 atm
​n = 1atm×28.32 L0.082055 L atm mol-1 K-1×293K=1.179 mol
Volume of the gas at 12°C and 780 mm pressure
T = 285 K
P = 1.026 atm
V = ​
nRTP=1.179 mol× 0.082055 L atm mol-1 K-1×285 K1.026 atm=26.873 L

 

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