Kinetic Energy Problem

  • Thread starter dnl65078
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  • #1
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Please Help! Kinetic Energy Problem

1. The initial pressure in an ideal gas is 1.40 atm when its temperature is 299 K. The temperature is increased to 315 K and the volume is increased to 1.29 times its initial value. Calculate the final pressure.

2. R = 8.31 J/molK

PLEASE HELP!

THANKS IN ADVANCE!!
 

Answers and Replies

  • #2
ideasrule
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What have you tried already?
 
  • #3
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Thats just the thing. I cannot figure out what formula to use. The formula's I have are PV=nRT and PV=NKbT... none of the formulas I was given seem to be valid for a "change in temp/volume"
 
  • #4
ideasrule
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Try writing out PV=nRT for both the "before" and "after" situations. You'll be able to solve for the final pressure from there, even though you don't know n (and don't need to know R).
 
  • #5


Make 2 equations and solve by dividing the equations. Cancel out the same unknown.
 

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