Volume of oxygen st STP= 0.049 L Experimental molar volume at STP= 24.95 l/mol A
ID: 858391 • Letter: V
Question
Volume of oxygen st STP= 0.049 L
Experimental molar volume at STP= 24.95 l/mol
Accepted molar volume at STP= 22.58 L/mol
Percent Error= 10.49 %
I need help answering the following questions:
1. (a). Use your data for oxygen gas at room temperature to calculate the gas constant using oxygen pressure not room pressure.
(b). What is the accepted value for the gas constant, using the same units & significant figures as the vaule you calculated in part (a)?
(c). Calculate the percent error in your gas constant. (Hint: it should be about the same as the percent error in your molar volume value)
Explanation / Answer
1)747.01mmHg=747.15/760=0.98 atm
PV=nRT
0.98 * V = 0.002*0.0826*296.15
V=0.049L
2)experimental molar volume=0.0499L/0.002moles=24.95L/mol
P1V1/T1= P2V2/T2
(0.98atm)(0.05L)/296.15K=1atm * V2/273K
V2=0.98*0.05*273/296.15=0.045L
accepted molar volume at STP= 0.045L/0.002moles=22.58L/mol
4)percent error=(experimental-accepted)/accepted * 100
(24.95-22.58)/22.58 *100=10.49%
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