# Please give me a detail explanation. I am really poor at chemistry. Thank you!When released at sea level at 25 ℃ and 1 atm pressure, a certain weather balloon containing He has a radius of 1.5 m. At its maximum altitude, where the temperature is -20 ℃, the radius increases to 4.0 m. What is the pressure inside the balloon at its maximum altitude?

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Please give me a detail explanation. I am really poor at chemistry. Thank you!

When released at sea level at 25 ℃ and 1 atm pressure, a certain weather balloon containing He has a radius of 1.5 m. At its maximum altitude, where the temperature is -20 ℃, the radius increases to 4.0 m. What is the pressure inside the balloon at its maximum altitude?

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Step 1

The pressure inside the balloon after the radius increased can be calculated using the ideal gas equation.  The given initial and final values of the balloon can be noted down as follows:

Step 2

The given values has to be substituted in the ideal gas equation to ...

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