Will the following reaction occur spontaneously at 25°C? Justify your answer. 3 O2(g) → 2 O3(g)
∆H°rxn = 285 kJ/mol ∆S°rxn = −137 J/mol·K

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )