Question

During a reversible isothermal expansion, the entropy of an ideal gas:

a) decreases

b) stays constant

c) increases

When dry ice sublimes into gas at 194.65 K and 1 atm, the entropy

a) increases

b) stays constant

c) decreases

Which one of the following is true?

a) The entropy of an isolated system can only stay constant or increase during a process

b) We can construct a heat engine that extracts heat from a hot reservoir and delivers an equal amount of work

c) We can construct a refrigerator whose sole effect is to transfer heat from a cooler object to a hotter one

Thank you!

Answer 1

US SOLD* 17. During a reversible isothermal expansion .. (Change in Entropy of the surrounding is eq491 and opposite to the change in the system) Hence tas=o1 :. Entropy stays constant by 27. and laten When dry a sublimes into gas at 194.65K . qs volume increases." Henie, Mandomness increases. therefore, Entoopy increases option (a) is correct... | 31. Checking options:e. (a). According to second law of thermodynamics states that the "Entropy of an īsoicited syster” never decreasee asi isolated systems always evolle lowards thermodynamic equilibrium , withi maalimum entropy..

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