The first ionization energy of an element is 176 kilocalories per mole of atoms. An atom of this element in the ground state has a total of how many valence electrons?

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

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