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    iduru's Avatar
    iduru Posts: 1, Reputation: 1
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    Jan 12, 2017, 04:41 AM
    A weather balloon containing helium is released into the atmosphere. As it rises atmospheric pressure and temperature both decreases. Explain why the size of the balloon increases.
    Curlyben's Avatar
    Curlyben Posts: 18,470, Reputation: 1857
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    Jan 12, 2017, 04:52 AM
    What do YOU think.
    While we happy to help we will NOT do all the work for you.
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
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    Jan 12, 2017, 04:37 PM
    Here is your answer. PV=mRT... where p is pressure, V is the volume of the balloon, m is the mass of gas in the balloon (constant) and R is universal gas constant divided by mean molar wt of air (about 28 g/mol) and T is thermodynamic temperature (T in Kelvin; T=273 +t (in deg C). Think pressure.

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