Which, if any, is/are valid forms of the Second Law of Thermodynamics?

[ss883]

What I answered is in brackets...what did I answer incorrectly?

• It is impossible to construct a device that, operating in a cycle, will produce no effect other than the extraction of heat from a reservoir and the performance of an equivalent amount of work. [True]
• For all naturally occurring processes, Sgen > 0. [True]
• It is impossible to construct a device that, operating in a cycle, will produce no effect other than the transfer of heat from a lower-temperature reservoir to a higher-temperature reservoir. [True]
• It is impossible to construct a device that, operating in a cycle, will produce no effect other than the transfer of heat from a higher-temperature reservoir to a lower-temperature reservoir. [True]
• Ein - Ein = ∆Esystem [False]
• For all naturally occurring processes, Sgen ≤ 0. [False]
• All of the above statements are true. [False]

 

[SammyS]

What I answered is in brackets...what did I answer incorrectly?

• It is impossible to construct a device that, operating in a cycle, will produce no effect other than the extraction of heat from a reservoir and the performance of an equivalent amount of work. [True]
• For all naturally occurring processes, Sgen > 0. [True]
• It is impossible to construct a device that, operating in a cycle, will produce no effect other than the transfer of heat from a lower-temperature reservoir to a higher-temperature reservoir. [True]
• It is impossible to construct a device that, operating in a cycle, will produce no effect other than the transfer of heat from a higher-temperature reservoir to a lower-temperature reservoir. [True]
• Ein - Ein = ∆Esystem [False]
• For all naturally occurring processes, Sgen ≤ 0. [False]
• All of the above statements are true. [False]

[*] It is impossible to construct a device that, operating in a cycle, will produce no effect other than the transfer of heat from a higher-temperature reservoir to a lower-temperature reservoir. [True]

I think this one is the problem.