The air in a bicycle tire is bubbled through water and collected at 25^{\circ

alka8q7 2021-11-17 Answered

The air in a bicycle tire is bubbled through water and collected at 25C. If the total volume of gas collected is 5.45 L at a temperature of 25C and a pressure of 745 torr, how many moles of gas were in the bicycle tire?

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Expert Answer

Froldigh
Answered 2021-11-18 Author has 17 answers

Step 1
T=(25+273.15)K=298.15K
Pt=745rr=745mmHg
PH2O=23.78mmHg
V=5.45L
ngas=?
Write down the known and unknown values.
Step 2
Pt=PH2O+Pgas
Pgas=PtPH2O
=745mmHg23.7mmHg
=721.3mmHg
Use the gas-evolution equation based on Dalton's Law of partial pressures to calculate the partial pressure of the gas evolved.
Step 3
Pgas=721.3g1atm760g=0.94908atm
Convert the partial pressure of the evolved gas into atmospheres.
Step 4
PgasV=ngasRTngas=PgasVRT=0.94908mol5.450.08206298.15=0.211mol
Use the Ideal Gas Law to calculate the number of moles of the evolved gas.

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