Answer:
You can boil 17.6g of ethyl alcohol with 15000J of energy.
Step-by-step explanation:
Heat of vaporization is defined as the amount of energy that must be added to a liquid substance to transform this substance into a gas.
The heat of vaporization of ethyl alcohol is 850 J/g. That means with 850 J you can boil 1g of ethyl alcohol. Now, 15000J can boil:
15000J × (1g / 850J) = 17.6g
Thus, you can boil 17.6g of ethyl alcohol with 15000J of energy.