Determine whether each description corresponds to an endothermic reaction or an exothermic reaction. a. The reaction mixture feels cool from the outside.
b. Heat is a product in the reaction.
c. The reaction mixture feels warm from the outside.
d. Heat is a reactant in the reaction. Choose...

56 moles of   lieter in chemistry

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.