Textbook Question
Identify each of the following changes of state as melting, freezing, sublimation, or deposition:b. Snow on the ground turns to liquid water.
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3. Matter and Energy
States of Matter
Multiple Choice
Nitric acid, which is used in the production of fertilizers, plastics and dyes, has a melting point of – 42ºC and a boiling point of 83ºC. Determine its physical state at a temperature of 110ºC.
A
Solid
B
Liquid
C
Gas
D
Plasma
Verified step by step guidance1
Identify the melting point and boiling point of nitric acid: melting point is -42ºC and boiling point is 83ºC.
Understand the physical states of matter: below the melting point, a substance is solid; between the melting point and boiling point, it is liquid; above the boiling point, it is gas.
Compare the given temperature (110ºC) with the melting and boiling points of nitric acid.
Since 110ºC is greater than the boiling point of 83ºC, determine that nitric acid is in the gaseous state at this temperature.
Conclude that at 110ºC, nitric acid is a gas, as it is above its boiling point.
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