Flashcards in Phases Deck (17):
Does a physical change disrupt intramolecular bonds or intermolecular
What is gas to solid called?
If bring molecules together what happens to heat?
It is released
If molecules are spread apart what happened to heat?
It is absorbed
What is a calorie?
Amount of heat required to raise temp of 1 gram of water by 1 degree Celsius
How many joules in 1 calorie?
Does temp change and phase change happen at the same time?
Amount of heat absorbed or released is proportional to what?
What does specific heat tell us?
How resistant substance is to changing temp
What is specific heat dependent on?
Phase of substance
At high temps and low pressure what phase is preferred?
At high pressure and low temp what phase is preferred?
What is critical point?
Marks end of liquid gas boundary. There is high density and low viscosity
What is triple point?
Temp and pressure that all three phases exist in equilibrium
Can pressure force supercritical fluid back to liquid phase?
For water does an increase in pressure or decrease in pressure favor liquid phase?