13. For an isothermal process, S = ________ [A] T q rev [B] q [C] q rev /T [D] q

ID: 967160 • Letter: 1

Question

13. For an isothermal process, S = ________

[A] Tqrev [B] q [C] qrev/T [D] q + w [E] qrev

14. Which one of the following is always positive when a spontaneous process occurs?

[A] Suniverse [B] Ssystem [C] Huniverse [D] Hsurroundings [E] Ssurroundings

15. The second law of thermodynamics states that ________

[A] for any spontaneous process, the entropy of the universe increases

[B] the entropy of a pure crystalline substance is zero at absolute zero

[C] H°rxn = nH°f (products) - mH°f (reactants)

[D] E = q + w

[E] S = q/T at constant temperature

16. In a particular spontaneous process the entropy of the system decreases. What can you conclude about the sign and magnitude of Ssurr?

[A] Ssurr is negative and greater than the magnitude of the decrease in Ssys

[B] Ssurr is positive and less than the magnitude of the decrease in Ssys.

[C] Ssurr is negative and less than the magnitude of the decrease in Ssys.

[D] Ssurr is positive and greater than the magnitude of the decrease in Ssys.

[E] Ssurr is positive and equal to the magnitude of the decrease in Ssys

13.

Isothermial processes dS = Qresv/T

since heat will be reversible

14.

dS universe, according to second law of thermodynamcics

15.

as estated before, the

[A] for any spontaneous process, the entropy of the universe increases

16.

if spontanoeus, dS univeres > 0

dS univ = S system + S surr

if S system is negative

then

S system + S surr >0

S surr > S system

[D] Ssurr is positive and greater than the magnitude of the decrease in Ssys.

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