This question is oddly worded, but I am assuming that the author means to ask "in chemical equations for endothermic reactions, is the change in energy (delta H) positive or negative?".
For endothermic reactions, heat is absorbed during the reaction, so the energy of the products is higher than the energy of the reactants. Since dH = H(products) - H(reactants). Therefore, dH is positive.
An endothermic reaction occur with heat absorption.
Heat is written as a product of the reaction (apecs answer)
Exothermic reaction: with release of heat Endothermic reaction: with absorption of heat
An endothermic reaction need heat to begin.
Heat is included as one of the products.
The heat in an endothermic reaction is included as a reactant on the left side of the equation, and has a positive value.
The heat in an endothermic reaction is included as a reactant on the left side of the equation, and has a positive value.
Heat is included as a reactant in the reaction.
on the left side of the equation
heat is included as a reactant in the reaction
heat is included as one of the products
heat is included as a reactant in the reaction - apex
An endothermic reaction occur with heat absorption.
An endothermic reaction absorbs heat, an exothermic reaction releases heat.
Endothermic-take in Heat, as opposed to exothermic which gives off heat-like a fire or explosion.
Heat is written as a product of the reaction (apecs answer)
An endothermic reaction need heat to occur.