Which chemical equation represents the oxidation of lithium (li) in an electrochemical cell?

a. li ® li+1 + 1e–
b. li ® li +1 + 2e–
c. li ® li+2 + 1e–
d. li ® li+2 + 2e–

I believe the correct answer is A. The chemical equation that represents the oxidation of the lithium ion would be Li = Li+1 + 1e–. In an oxidation reaction, the atom release or donate the valence electrons making an ion and free electrons. For lithium, the valence electron is 1.

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.