Originally Posted by **studiot** You titled this question entropy and the Second Law.
So you presumably know what this law states.
So ask yourself
What is the heat exchanged?
If the answer is zero then the entropy change is also zero.
I will probably have to repeat this next bit in your other question, as I haven't looked at it yet.
The Second Law does **not** say entropy must increase.
It says that in an isolated system entropy can never decrease.
There is a difference. |

Yes there is heat exchanged. By making your room tidy or solving a jigsaw puzzle, you are heating up the whole planet.

Your body sweats when you solve a jigsaw puzzle or tidy your room to release transfer heat from your body to Earth. The sweat evaporates and this is how your body moves heat from inside your body and transmits it to the environment (Earth).

When you heat up the whole planet, you are increasing the entropy. The increase in entropy is S=Q/T where Q is the heat your body emits and T is the Temperature of Earth.