Question

Thermodynamics.Entropy-2nd-Law.MS.KC.7: An isolated chamber is split into two sides by a di- vider and side 1 has no air while side 2 is full of air. The divider is removed. Compare the initial and final state from before the divider was removed to long after, when the system has reached equilibrium. Which of the following statements are false.

(a) The entropy of the entire system has decreased. (b) The entropy of the entire system has increased. (c) The entropy of side 1 has increased.
(d) The entropy of side 2 has increased.

(e) The entropy of side 2 has decreased.
(f) The thermal energy of the entire system will remain a constant.
(g) The thermal energy of the entire system will increase.
(h) The average temperature of the entire system will remain a constant.

Answer 1

given

isolated cha,ber divided by divider
part1, has no air
par2 full of air

divider is then removed

after equilibrium

a. entropy of the part with no air has increased
entropy of the part with air has decreased
overavall macrostates available to molecules has increased
hence
total entropy of the sample has increased

also, isolated chamber means, no heat transfer
hence the thermal energy of the system shall decrease nad hence the average temeprature of the chamber will fall

hence the answers are
b) The entropy of the entire system has increased.
(c) The entropy of side 1 has increased.
(e) The entropy of side 2 has decreased.