Help with Gas Law Math Problem (Charles' Law). PLEASE?

  • Thread starter Thread starter Mike T
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Mike T

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Here is the question that I need help for. Also if you can help me to set it up so i can try to see how you get the answer. Thanks so very much in advance.

While working with a lab involving Charles’ Law, Ken found the total volume of a 125-ml flask with a stopper and glass tube to be 140mL. He boiled the flask, filled with air, at a temperature of 85 degrees Celsius for 15 minutes then placed it in the water bath for 10 minutes. After equalizing the pressure in the flask with that of the room, he measured the water in the flask as 15mL. The temperature of the water bath after the 10 minutes was 27 degrees Celsius.

A) What was Ken’s experimental value of the change in volume of the air?
B) What is the theoretical value for this change in volume?
C) What was Ken’s % error?

[ % error = (theoretical – experimental) / theoretical ]
 
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