During which of the following processes is energy absorbed? i think evaporation i. boiling ii. condensing iii. evaporating iv. freezing v. melting vi. sublimating

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together