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# Which of the following are formulations of the second law of thermodynamics?

Updated: 8/10/2023

Rachana Brown

Lvl 1
3y ago

It isn't possible to change heat completely into work, with no other change taking place.

No system can convert energy from one form to another useful form with 100% efficiency.

It's not possible to transfer heat from an object at a lower temperature to another object at a higher temperature unless work is done.
APEX: Entropy of a system increases over time.

C.No system can convert energy from one form to another useful form with 100% efficiency.It's not possible to transfer heat from an object at a lower temperature to another object at a higher temperature unless work is done.It isn't possible to change heat completely into work, with no other change taking place.

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Î´Q = T dS (closed system, perfectly reversible process - which doesn't really exisit)

Î´Q < T dS (closed system, real, irreversible processes)

Rudolph Clausius:

• "Heat can never pass from a colder to a warmer body without some other change, connected therewith, occurring at the same time."
Lord Kelvin:
• "It is impossible, by means of inanimate material agency, to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects."
Planck
• " Every process occurring in nature proceeds in the sense in which the sum of the entropies of all bodies taking part in the process is increased. In the limit, i.e. for reversible processes, the sum of the entropies remains unchanged."
• "The internal energy of a closed system is increased by an adiabatic process, throughout the duration of which, the volume of the system remains constant."
• "In every neighborhood of any state S of an adiabatically enclosed system there are states inaccessible from S"

Wiki User

6y ago

Elsa Bear

Lvl 1
1y ago
this was a confusing answer, but i just took the test and it's all of the options as the answer, so select all the boxes

Wiki User

10y ago

No system can convert energy from one form to another useful form with 100% efficiency.

and

Entropy of a system increases over time.

Ray Walker

Lvl 1
3y ago
If it’s wrong don’t or don’t know don’t answer the q

Wiki User

12y ago

Heat cannot of itself pass from a colder body to a hotter body.

Anonymous

Lvl 1
3y ago

No system can convert energy from one form to another useful form with 100 % efficiency.

Entropy of a system increases over time.

APEX :)

Anonymous

Lvl 1
3y ago

Mdufbrurir

Anonymous

Lvl 1
3y ago
u rlly had to do this bru

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Q: Which of the following are formulations of the second law of thermodynamics?
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