Calculate the amount in moles of a gas which oc... - JAMB Chemistry 2017 Question
Calculate the amount in moles of a gas which occupies 10.5 dm3 at 6 atm and 30oC [R = 082 atm dm3 K-1 mol-1]
A
2.536
B
1.623
C
4.736
D
0.394
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Correct Option: A
For an ideal gas PV = nRT
Amount in moles = n
Volume v = 10.5dm3
Pressure P = 6atm
Temperature T = 30°C + 273 = 303k
R, Gas constant = 0.082 atmdm3k-1 mol
Recall from ideal gas equation
pv = nRT
n = (\frac{RV}{RT})
n = (\frac{6 \times 105}{0.082 \times 303})
n= 2.536mol
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