A spring is placed in a large thermostat at 27 degree C and stretched isothermally and reversibly
Question:
A spring is placed in a large thermostat at 27 degree C and stretched isothermally and reversibly from its equilibrium length, L_0, to 5L_0. During this process 1.0 J of heat is absorbed by the spring. The stretched spring, still in the thermostat, is then released without any restraining back tension and snaps irreversibly back to its equilibrium length L_0. During the contraction process 2.5 J of heat is lost from the spring to the thermostat. Calculate:
a. The overall delta E (stretching plus contraction) for the spring
b. The work done on the spring in the stretching process
c. The value of delta S for the spring in the stretching step
d. The value of delta S for the spring in the contraction step
e. The value of delta S for the spring plus the surroundings for the overall process
f. Does this process violate any laws of thermodynamics? Justify your answer.
University Physics with Modern Physics
ISBN: 978-0321501219
12th Edition
Authors: Hugh D. Young, Roger A. Freedman, Lewis Ford