Chapter 13-States Of Matter Flashcards
What is Kinetic Theory?
It describes the motion of gas particles as such;
- Gas particles are tiny, hard spheres with an insignificant volume.
- They move fast and in straight lines, they are also in constant motion.
- when they bump into each other, their collisions are perfectly elastic.
What is kinetic energy?
It is the energy of motion that is possessed by molecules.
What does it mean to have elastic collisions?
It means that the gas particles will hit and then bounce off each other (like bumper cars) without damaging the other particle or losing any total kinetic energy.
What is a barometer?
It’s a device used to measure atmospheric pressure of gases.
What would happen to the average kinetic energy if the temperature was increased?
The average kinetic energy would increase.
How are gases similar to liquids?
They are similar in the way they both flow freely (but gasses move faster and more randomly) and that they both have attractions to each other.
Properties of liquids can differ based on two things, what are they?
1-Their disruptive motion.
2-Their attractions.
Describe the motion of solids.
Solids’ particles stick together and vibrate in fixed positions.
Which of these statements is a characteristic of matter in the gaseous state?
A) Gas particles fill their containers completely.
B) Gas particles exert pressure.
C) Gas particles have mass.
D) Gas particles’ pressure is independent to the temperature.
E) Gas particles are compressible.
A) Gas particles fill their container completely.
What is a vacuum?
A vacuum is an empty space with no particles and no pressure.
What is the SI unit of pressure?
There are three, pascals (Pa), standard atmosphere (atm), and millimeters of mercury (mmHg).
Describe the numerical relationship between the three SI units of gas pressure.
1 atm = 760 mmHg = 101.3 Kpa
What is the standard temperature and pressure of gas?
Standard temperature= 0 degrees Celsius
Standard pressure= 101.3 Kpa or 1 atm.
When does a liquid reach boiling point?
When;
Vapor pressure = external pressure of liquid.
What is the normal boiling point of liquids?
It’s the boiling point of a liquid at 101.3 Kpa.
