$$\Delta$$  S>0 because the gas decreased in volume

$$\Delta$$  S<0 because the gas decreased in volume

$$\Delta$$  S>0 because the gas decreased in temperature

$$\Delta$$  S<0 because the gas decreased in temperature

$$\Delta$$  S>0 because the original gas has less volume available

$$\Delta$$  S<0 because the original gas has less volume available

$$\Delta$$  S>0 because there are more particles of different types present

$$\Delta$$  S<0 because there are more particles of different types present

No engine can be 100% efficient

Transferring energy from a cold to a hot bath requires work

the entropy of the universe increases with a spontaneous process

All of these are true

$$\Delta$$  H>0, $$\Delta$$  S>0

  $$\Delta$$  H<0, $$\Delta$$  S<0

  $$\Delta$$  H>0, $$\Delta$$  S<0

 H<0, $$\Delta$$  S>0

$$\Delta$$  U(uni) = $$\Delta$$  U(sys)+ $$\Delta$$  U(surr)

S $$\degree$$  = 0 for perfect Li(s) @ 0K

$$\Delta$$  S(uni) > 0 (spontaneous process)

$$\Delta$$  S = $$\Delta$$  H(rev)/T @ constant T

spontaneous only at high T

spontaneous only at low T

always spontaneous

always sponaneous in the reverse direction

$$\Delta$$  S = (-)

$$\Delta$$  S = (+)

$$\Delta$$  S = equilibrium