Question
Part 1 of 3:
An apparatus consists of a 2 L flask containing nitrogen gas at 30 degrees C and 758 kPa, joined by a valve to a 11 L flask containing argon gas at 30 degrees C and 49.7 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing?
Answer in units of kPa
Part 2 of 3:
What is the partial pressure of argon after mixing?
Answer in units of kPa
Part 3 of 3:
What is the total pressure of the gas mixture?
Answer in units of kPa
An apparatus consists of a 2 L flask containing nitrogen gas at 30 degrees C and 758 kPa, joined by a valve to a 11 L flask containing argon gas at 30 degrees C and 49.7 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing?
Answer in units of kPa
Part 2 of 3:
What is the partial pressure of argon after mixing?
Answer in units of kPa
Part 3 of 3:
What is the total pressure of the gas mixture?
Answer in units of kPa
Answers
DrBob222
The long way of doing this, but the easier to explain, is as follows.
Use PV = nRT and solve for n N2 in the 2L tank.
Use PV = nRT and solve for n Ar in the 11 L tank.
Then add nN2 + nAr = nTotal and
use PV = nRT with a volume of 13 L (the sum of the 11 and 2 L tanks). That gives you #3 answer.
Then for PN2 after mixing use PV = nRT and use nN2 for n and use 13 for Vtotal.
Do the same thing for pAr but use nAr and 13 L
Use PV = nRT and solve for n N2 in the 2L tank.
Use PV = nRT and solve for n Ar in the 11 L tank.
Then add nN2 + nAr = nTotal and
use PV = nRT with a volume of 13 L (the sum of the 11 and 2 L tanks). That gives you #3 answer.
Then for PN2 after mixing use PV = nRT and use nN2 for n and use 13 for Vtotal.
Do the same thing for pAr but use nAr and 13 L