Water-borne diseases, including cholera, typhoid, and dysentery, are caused by drinking water containing infectious viruses or bacteria, which often come from human or animal waste. Water-washed diseases, such as skin and eye infections, are caused by lack of clean water for washing.
Condensation, because when water vapor turns into water again it needs to release energy to do so. Its like turning ice into water again.
I hope this helped ^_^
B. sulfur tetrafluoride + water → hydrogen fluoride + sulfur dioxide
