1. The problem asks for the coefficient of the second term in the expression $8a^2$. 2. The expression $8a^2$ contains only one term, which is $8a^2$ itself. 3. Since there is only one term, there is no second term in this expression. 4. Therefore, the coefficient of the second term does not exist because the second term does not exist. Final answer: No second term, so no coefficient for it.