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24-02-2017
Chemistry

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If a balloon is filled with 20 cc of air at 25 celsius what will its volume be at 0 celsius?

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taskmasters taskmasters

10-03-2017

Using the ideal gas law: PV = nRT; and given the initial conditions:

V1 = 20 cc
T1 = 25 C or 298 K

We are asked to determine the volume at 0 C or 273 K. Assume that the pressure and number of moles are constant. Thus,

V/T = constant, then

V1/T1 = V2/T2

Solve for V2:

20 cc/ 298 K = V2/ 273 K

V2 = 18.32 cc

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