The molar enthalpy of solution of ammo nium chloride is +14.8 kJ/mol. What would be the final temperature of a solution in which 40.0g of ammonium chloride is added to 200.0mL of water, initially at 25°C?

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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?