1. The problem statement, all variables and given/known data How many kilocalories of heat are needed to change 143N of ethyl alcohol at 65°C to vapour? 2. Relevant equations Lv = Q/m 3. The attempt at a solution I'm really stuck. I have no idea how to work the units of N with heat problems. I've looked online and in my book and have no idea how to get to the solution but I know the final answer is 3090kcal. A nudge in the right direction is greatly appreciated!