Chem topic test
A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to -3.5°C. If there is no volume change in the tire, what is the pressure after the temperature change? Use mc006-1.jpg.
0.75 atm
What is the volume of 0.200 mol of an ideal gas at 200. kPa and 400. K?
3.33 L
Which is a postulate of the kinetic-molecular theory?
Gas particles have a small volume relative to the spaces between them.
Which is an aspect of the kinetic-molecular theory and can be used to explain the compressibility of plasmas?
Particles move independently of one another and are widely spaced.
Which statement best compares the melting point of butane (C4H10) with that of octane (C8H18)?
The melting point is higher for the substance that has stronger intermolecular forces.
According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another?
The volume stays the same, but the shape changes to fit the new container.
Why do amorphous solids not have a long-range order in the arrangement of their particles?
Their formation involves very rapid cooling.
Which best characterizes a crystal?
a dense substance that is hard and incompressible
Which commercial technology commonly uses plasmas
a television
The diagrams show gases that are stored in two separate but similar containers. mc014-1.jpg If both gases are at the same temperature, which one has the greater pressure?
gas 2 because it has more particles that are colliding
Which sequence describes the result of increasing the temperature of a gas in a container?
higher kinetic energy ® greater collision force ® higher pressure
When the process of condensation occurs, the kinetic energy of particles
is insufficient to overcome intermolecular forces.
The volume of a gas decreases to half of its original volume, but the gas maintains the same number of moles and temperature. According to the ideal gas law, what will most likely happen to the pressure?
it will double
Which units of pressure are equivalent and require no conversion of the value?
mmHg and torr
The ideal gas constant, R has several different values that could be used. Which quantity causes these differences?
pressure