Is the equation below endothermic or exothermic?
2C3H7OH(l) + 9O2(g) 6CO2(g) + 8H2O(g) +1260 kJ

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?