The lewis representation above depicts a reaction between a halogen (blue) and a main-group element from group (red). in this representation, each y atom needs electron(s) to complete its octet, and gains these electrons by forming bond(s) with atoms of x . there are unshared electron pair(s) and bonding electron pair(s) in the product molecule. the bonds in the product are

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

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.