A perfectly expandable balloon filled with helium gas at 27°C and a pressure of 720 mm of Hg has a volume of 100 l. The balloon rises to an altitude where the pressure is 420 mm of Hg and the temperat

Question

A perfectly expandable balloon filled with helium gas at 27°C and a pressure of 720 mm of Hg has a volume of 100 l. The balloon rises to an altitude where the pressure is 420 mm of Hg and the temperature –53°C. What is the change in the volume of the balloon?

Prashant Kotian · Accepted Answer

Correct answer: B. V2 = 100 * (720/420) * (220/300) = 125.7 L. Change = 125.7 - 100 = 25.7 L. Therefore, correct answer is B.

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