X+ y xy + heat what happens as the temperature is increased?

What happen  as  temperature is increased is that the equilibrium  will  shift to the  left  that is the side of the reactant.

   
The increase of temperature in  is X +Y⇆XY  reaction led  to the  shift of equilibrium to the  left (reactants  side). This is because the  reaction  between  X and Y is  exothermic(release heat)  and thus  increase in temperature  will  led to increase   in amount of the  product.  This led to the   shift of the balance at equilibrium    toward the reactants side.

Organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.