Phase Changes Flashcards
What is it called when a solid is heated and turned into a liquid.
It has heated through to it’s melting point
When a substance changes states we say that it has undergone a _________
Phase change
What is the term when a solid substance has turned directly into a gas?
Sublimate
When a liquid has been heated and vaporized into a gas
It has reached it’s boiling point
If a gas is cooled through it’s boiling point and condenses into a solid, what is this called?
Deposit
Define the latent heat of transformation
Latent heat of transformation tells us how much hear it takes to change the phase of a substance
These values are different for different materials, and specific to melting and freezing
Define the latent heat of fusion
It is the latent heat gained/lost in transforming a solid into a liquid or a liquid into a solid
Define sublimation
When the phase change of matter jumps from a solid to a gas
Define resublimation
When matter changes phases from a gas to a solid
Eg. Frost
What is saturation?
The limit of an amount
Define relative humidity
How much water is in the air relative to temperature
How does altitude effect boiling water?
The higher the altitude, the higher the pressure, so the boiling point decreases
Why is a steam burn worse than a boiling water burn?
Because the kinetic energy of the steam transfer into the flesh and continues to heat from the inside
What does the following equation represent?
Q=mh(^v)
Energy = mass x latent heat of vaporization
Define latent heat of vaporization
How much heat is gained or lost in the phase change of a liquid into a gas, or a gas into a liquid
