Ido not get anything! will mark brainiest answer 1. to produce heat, an instant heat pack uses a chemical reaction. discuss the general chemistry behind the heat production by the heat pack (you do not need to discuss the specific reaction that occurs in a heat pack). also describe the application of the law of conservation of energy to what’s occurring in the heat pack and as the heat spreads to the surrounding environment.

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.