Question bank/JEE Main/Chemistry
JEE MainChemistryModeratePhysical Chemistry
If 10-4 dm3 of water is introduced into a 1.0 dm3 flask at 300
K, how many moles of water are in the vapour phase when equilibrium is
established ?
(Given: Vapour pressure of H2O at 300 K is 3170 Pa; R= 8.314 J K-1
mol-1)
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( 300 K ij H2O dk ok"i nkc 3170 Pa
Show answer and solution
PV = nRT
V = 1 dm3 = 10-3 m3
P = 3170 Pa
R = 8.314 J K-1 mol-1
T = 300 K
3170 × 10-3 = n × 8.314 × 300
n = =1.27 × 10^-3 mol
V = 1 dm3 = 10-3 m3
P = 3170 Pa
R = 8.314 J K-1 mol-1
T = 300 K
3170 × 10-3 = n × 8.314 × 300
n = =1.27 × 10^-3 mol
Source: Grass-G / CH-27 Chemistry Paper 2 15 Jan.docx
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