Question

1. which process is exothermic?

options:

• boiling of water
• melting of copper
• sublimation of iodine
• condensation of ethanol vapor

Explanation:

An exothermic process releases heat. Boiling (water), melting (copper), and sublimation (iodine) are endothermic (absorb heat). Condensation of ethanol vapor (gas to liquid) releases heat, so it's exothermic.

Answer:

Condensation of ethanol vapor