Which of the following is true of a reaction with a negative enthalpy? O A. The enthalpy of the reactants is greater than that of the products.
B. The reaction has a negative activation energy.
C. The enthalpies of the products and reactants are both negative.
D. The enthalpy of the reactants is less than that of the products.

The statement enthalpy of the reactants is greater than that of the products is true of a reaction with a negative enthalpy.

Explanation:

A chemical reaction where energy is being released is called an exothermic reaction.

In an exothermic reaction, the value of enthalpy of reaction is negative in nature.

Also, heat is being released which means the reactants has more energy than the products due to which the value of enthalpy is negative.  

Thus, we can conclude that the statement enthalpy of the reactants is greater than that of the products is true of a reaction with a negative enthalpy.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-