Essential University Physics: Volume 1 (4th Edition) Clone

Published by Pearson
ISBN 10: 0-134-98855-8
ISBN 13: 978-0-13498-855-9

Chapter 18 - Exercises and Problems - Page 341: 19

Answer

a) 1.33 b) 220 J

Work Step by Step

a) We know that the pressure will decrease to 75 kPa, which is .75 of the original pressure. According to the ideal gas law, the pressure and the volume of the balloon are inversely proportional, so it follows: $=\frac{1}{.75}=1.33$ b) We know that the work is given by: $W =-nRTln(c)$ Where c is a constant that we name in order to represent the fraction found in part a. Using this, we find: $W =-(.3)(8.314)(300)ln(1.33 )\approx 220 \ J$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.