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
    5- D
    6- D
    7- C
    8- B
    9- C

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

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  4. Hannah is correct! :P

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