previous 7of 14 T n Part A A very flexible helium-filled balloon is released fro

Question

previous 7of 14 T n Part A A very flexible helium-filled balloon is released from the ground into the air at 20. °C. The initial volume of the balloon is 5.00 L, and the pressure is 760. mmHg The balloon ascends to an altitude of 20 km, where the pressure is 76.0 mmHg and the temperature is -50. °C What is the new volume, ½, of the balloon in liters, assuming it doesn't break or leak? Express your answer with the appropriate units. Hints | vs | Value Units Submit My Answers Give Up Part B Consider 4.70 L of a gas at 365 mmHg and 20 C If the container is compressed to 2.00 L and the temperature is increased to 38 C what is the new pressure, P. inside the container? Assume no change in the amount of gas inside the cylinder. Express your answer with the appropriate units. Hints Submit My Answers Give Up ^a:@ ..114:12/1/2017

Explanation / Answer

Part-A

         Initial                            Final

P1=760mm                       P2=76mm

V1=5.0l                            V2= ?

T1=20C= 20+273=293K       T2= -50C= -50+273=223K

Application of Ideal gas equation

P1V1/T1 = P2V2/T2

760x5.0/293= 76xV2/223

12.969 = 0.340xV2

V2= 12.969/0.340 = 38.14L

V2= 38.14L

Part-b

                Initial                                 Final

   P1= 365mm                             P2=

V1=4.70L                                 V2=2.0L

T1=20C= 20+273=293K            V2=38C=38+273= 311K

      P1V1/T1 = P2V2/T2

365x4.70/293 = P2x2.0/311

5.855=P2x0.0064

P2= 914.84 mm

P2= 914.8mm

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