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Homework Help: chemistry

Posted by Jonathan T on Saturday, March 22, 2008 at 7:28pm.

a 3.0L helium balloon is placed in a car sitting in hot sunlight. The temperature in the mall, when the balloon was bought, was 22C. The temperature in the car is 45C.
what will be the new volume of the of the balloon.
Will it be: 6.14L?

I would think this looks right but the only thing that confuses me, is that I think the volume should actually decrease, not increase.
Please Help
Thanks

• chemistry - newshound, Saturday, March 22, 2008 at 7:41pm

  Why should it decrease. Charles' Law says that volume increases if T increases. T went from 22 to 45. That's an increase and V should increase. The only think you have done wrong is to use degrees C for temperature. Charles' Law works only for KELVIN.
  

  • chemistry - Anonymous, Sunday, March 23, 2008 at 3:51pm

    2+2=?
    

• chemistry - Jonathan T, Saturday, March 22, 2008 at 7:50pm

  but is my answer correct?
  

• chemistry - newshound, Saturday, March 22, 2008 at 7:57pm

  How can it be correct if you used C instead of Kelvin?
  V1/T1= V2/T2
  V1 = 3.0 L
  V2 = solve for this
  T1 = 22 + 273
  T2 = 45 + 273
  

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