I think its a system that excretes wastes from the body.
<span> The Alkali elements are so reactive that they are </span><span>never found alone in nature</span>
The keyword here is gas condenses to a liquid, which mean we're talking about condensation process
The enthalpy energy in condensation process is negative because it releases energy
The entropy in general will also decreases .
Temperature affect this change because it will create free energy if added with this result
hope this helps
