20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt 20 pt 30 pt 40 pt 50 pt 10 pt States of Matter Phase Changes Gas Pressure Gas law 1 Gas Law 2
Name three states of matter
Solid, liquid and gas
Forces of attraction are stronger between the solid particles (True/False)
True
In which state of matter the forces of attraction among the particles are so weak that they can be ignored under ordinary conditions?
Gas
Which of the following phase changes is an endothermic change? a. condensation b. vaporization c. deposition d. freezing
b. vaporization
Which of the following phase changes is an exothermic change? a. sublimation b. deposition c. vaporization d. melting
b. deposition
The phase change in which a substance changes from a liquid to solid is ________________
Freezing
During a phase change, the temperature of a substance does not change (True/False)
True
The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid is __________________.
Sublimation
The phase change in which a substance changes from gas directly to a solid is _______.
Deposition
a e b d cf Complete the phase change Diagram (vaporization, melting, condensation, deposition, freezing, sublimation) Solid Liquid Gas
a.Melting b.Freezing c.Vaporization d.Condensation e.Sublimation f.deposition
It is defined as force per unit area
Pressure
What are three factors that affect gas pressure
Temperature, Volume and number of gas particles
If the number of particles of gas is increased, the gas pressure will__________.
Increase
It is caused by collisions between the gas particles and the walls of the closed container.
Gas Pressure
What are units of pressure
Pascals
Lowering of the temperature will cause a decrease in gas pressure in a closed container? True/False
True
P1V1= P2V2 is the mathematical equation for which law
Boyle’s Law
The increase in the size of marshmallow in the vacuum pump demonstrate which law?
Boyle’s law
P1 = 20 P2= 50 V1=100 V2= ? Hint: P1V1=P2V2
V2= 40
If the volume of a cylinder is reduced from 8.0 liters to 4.0 liters, the pressure of the gas in the cylinder will change from 200 kilopascals to what new pressure? Hint: Use equation P1V1 = P2V2 P1V1/V2 = P2
400 Kilopascals
Which law states that the volume of a gas is inversely proportional to its pressure if the temperature and number of particles are constant
Boyle’s Law
is the mathematical equation for which law
Charles’s law
This law states that the volume of the gas is directly proportional to its temperature in Kelvin.
Charles’s law
The increase in the size of balloon in the beaker containing boiling water demonstrate which law?
Charles’s Law
T1= 20 T2=40 V1= 3 V2= ? Hint
V2= 6