Chemistry Test Two Questions
How does the ideal gas law differ from the combined gas laws?
The combined gas law focuses on how things are inversely and directly related, whereas the ideal gas law revolves around the fact that equal volumes of gases contain equal numbers of moles.
A sample of helium gas is in a sealed, rigid container. What occurs as the temperature of the sample is increased?
The frequency of collisions between atoms increases
Describe Charles' Law
The volume and absolute temperature of a gas are directly related (V/T=k)
Describe Dalton's Law
Total pressure of gases is equal to the sum of partial pressures of component gases
An ideal gas is made up of gas particles that
are in random motion
Mass of evaporating dish- 59.260g Mass of sugar sample- 1.61g What is the total mass of the evaporating dish plus the sample? (Proper significant figures)
60.87
As the pressure on a sample of hydrogen gas is changed from 740 torr to 760 torr at a constant temperature, it's volume
Decreases
Describe Avogadro's principle
Equal volumes of gases contain equal numbers of moles
A rigid cylinder contains a sample of a gas at STP. What is the pressure of the gas after being heated to 410 k?
1.5 atm
Which quantity of N2 gas has a volume of 11.2 liters at STP?
14.0 grams
The statement "the volume of the particle is negligible" describes an
Ideal gas
A real gas behaves least like an ideal gas under the conditions of
Low temperature and high pressure
As the piston moves toward point A at a constant temperature, which mathematical relationship between pressure (P) and volume (V) remains constant?
P x V
Which line best shows the relationship between the volume of an ideal gas and its pressure?
PV= K (curved line)
Which unit is used to express the pressure of a gas?
Pascal
Standard temperature and the pressure of .5 atm are equal to
0 degrees C, 380 torr
What is the difference between a real gas and an ideal gas?
An real gas is a gas at low temperature and high pressure and an ideal gas is a gas at high temperature and low pressure.
Increases
As the temperature of a sample of a gas increases at a constant pressure, the volume of the sample
As the temperature of a sample of a gas increases at a constant pressure, the volume of the sample
Increases
Describe Gay-Lussac's Law.
The pressure and absolute temperature of a gas are directly related (P/T=k)
Describe Boyle's Law
The pressure of a gas is inversely related to its volume (PV=k)
