Quiz | Properties of Gases
Which of the following statements is incorrect?
Gases are always miscible with each other
Gases exert pressure on the walls of any container
Gas volume changes with pressure but not with temperature
Gases have relatively low densities
Gas volume changes significantly with pressure AND temperature
Which of the following relationships is a correct statement of Gay-Lussac’s law?
P/T = constant
V/T = constant
PT = constant
PV = constant
At constant volume: P and T are directly proportional ⇒ = cste
What is the units of pressure and volume in the ideal-gas equation?
Bar and L
Pa and L
Pa and m3
Atm and m3
In the ideal-gas equation, the pressure is in Pa and the volume in m3
For an ideal gas, which pair of variables are inversely proportional to each other?
P and T
P and V
V and T
n and V
Ideal-gas equation: PV = nRT ⇒ If P increases, V decreases and vice versa (P and V are inversely proportional to each other)
Under what conditions does a real gas come closest to the behavior of an ideal gas?
Low P and T
High P and T
High P and low T
Low P and high T
Better conditions for a gas to behave like an ideal gas: monoatomic gas, low pressure, high temperature
Which of the following statements is not consistent with the kinetic-molecular theory of gases?
The gas consists mostly of empty space
The collisions between the gas particles are elastic
There are interactions between the molecules in a gas: they repel or attract one another
The mean kinetic energy of the molecules in a gas is proportional to the temperature
In the kinetic theory of gases, the molecules exert no attractive or repulsive forces on each other except during collisions ⇒ between collisions they move in straight lines