How much energy (in kilojoules) is required to convert 130mL of diethyl ether at its boiling point from liquid to vapor if its density is 0.7138 g/mL?

Answer 1

Use density to convert volume to grams.
Then q = mass ether x heat vaporization. If heat vap is in J then q will be in J and you will need to convert to kJ. You probably can find dHvap in tables in your text or on the web. I don't have these memorized.