What happens to naphthalene when heated?

Answer 1

Naphthalene, which is found in mothballs, when heated sublimes (which means it changes from a solid directly into a gaseous state without going through the liquid state).

Answer 2

If you take off the top of the bottle of naphthalene and have a smell, you get the strong odour of old fashioned moth balls. Why .. because as you correctly say, it is subliming. However this is not instantaneous. It is a relatively slow process. Yes, if you left the top off the bottle, it would all sublime, but not today or tomorrow ... it would take quite a few days. Old fashioned moth balls, that granny put in her drawer to stop the moths eating her wolly cardigans, lasted for weeks or months.

When you start heating it is still subliming, but at a faster rate. However, when you reach 80C it will melt pretty rapidly as this is it's melting point. You get a colourless liquid. Note that the liquid, although not boiling, is still forming naphthalene vapour.

Hope this explains clearly!

Answer 3

Naphthalene has the chemical formula C10H8. It is the simplest aromatic hydrocarbon and has a melting point of 176.5 degrees Fahrenheit or 80.26 degrees Celsius.

Answer 4

During melting the temperature of naphthalene remains constant until all of the solid has turned into liquid. Its melting point is 80.26 degrees Celsius.

Answer 5

the melting point of naphthalene is about 85 degrees Celsius

Answer 6

Temperature stays unchanged during freezing at the melting point level

Answer 7

80.26 degrees

Answer 8

80.26 degrees Celsius

Answer 9

80