# chemistry

Hot air balloons gain their lift from the reduction in the density of air that occurs when the air in the envelope is heated. To what temperature should you heat a sample of air (initially at 374 K) to increase its volume by 13%? Answer in units of K.
thanks for helping !

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1. (V1/T1) = (V2/T2)
Since they don't give a volume, just make up a convenient number for V1(say 100 L) then V2 will be 113 L.

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2. 1- C
2-B
3-C
4-B,C
5- D
6- D
7- C
8- B
9- C
10-C

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3. Hannah is 100% correct! ^_^ Thanks!

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4. Hannah is correct! :P

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