Phases
No description yet. This curated deck is ready for daily study.
Card preview (14)
When a material undergoes a phase change, only ________________ bonds are broken or formed. a) intermolecular b) intramolecular
a) intermolecular between molecules, not within molecules
What is the opposite of freezing?
fusion
What is the opposite of condensation?
vapourization
What is the process of sublimation? a) gas –> liquid b) solid –> gas c) gas –> solid d) liquid –> gas
b) solid –> gas
What is the opposite of sublimation?
deposition
Does a gas or solid have higher entropy?
gas
What are the 5 assumptions of the kinetic molecular theory of ideal gases?
• gas particles extremely small –> have mass, but no volume • constant, random, straight-line motion • elastic collisions –> momentum and total KE conserved • gas particles do NOT experience intermolecular forces with other gas particles • average KE of entire gas sample is proportional to temperature
What does a barometer measure?
atmospheric pressure
What does a manometer measure?
pressure of an unknown gas
Convert 1 atm to Torr, mmHg, kPa, and bar.
1 atm = 760 Torr = 760 mmHg = 101 kPa = 1 bar
What volume does 1 mol of an ideal gas occupy at STP (standard temperature and pressure)?
22.4 L STP= 273.15 K and 1 atm
What does a calorimeter measure?
energy changes of a given process
What is the definition of specific heat capacity (c)?
amount of energy required to change the temperature of 1 gram of a substance by 1 K
Why does ice float in water?
less dense than water