The gas with the highest molar mass is
H
2
Se
, which means it will have the lowest average speed.
What gas has the highest average velocity?
At a particular temperature, the average kinetic energy of all gaseous molecules is equal. Since
hydrogen gas
has the lowest mass out of these gases, it will have the highest average velocity.
Which of the following gas has lowest average speed at 298 K?
At 298 K, which of the following gases has the lowest average molecular speed?
CO
2
at 0.20 atm. He at 0.40 atm.
Which of the following gases has the highest average speed at 350k?
Graham's Law states that the rate of effusion of a gas is inversely proportional to its molar mass. Therefore, D) CH
4
will have the greatest average molecular speed at 25°C.
Which gas molecules have the greatest average?
Therefore,
methane
has the highest average molecular speed.
Which gas will diffuse faster?
The rate of effusion for a gas is inversely proportional to the square-root of its molecular mass (Graham's Law). The gas with the lowest molecular weight will effuse the fastest. The lightest, and therefore fastest, gas is
helium
.
What is the highest kinetic energy?
Particles has the highest kinetic energy when they are
in the gaseous state
. Kinetic energy is related to heat (also called thermal energy). Raising the temperature results in an increase of its kinetic energy.
What gas law is KMT explaining?
Kinetic Molecular Theory states that gas particles are in constant motion and exhibit perfectly elastic collisions. Kinetic Molecular Theory can be used to explain both
Charles' and Boyle's Laws
. The average kinetic energy of a collection of gas particles is directly proportional to absolute temperature only.
Which of the following gas has lowest average?
The gas with the highest molar mass is
H
2
Se
, which means it will have the lowest average speed. The answer is a. H
2
Se.
How do you determine the highest kinetic energy?
Solid particles have the least amount of energy, and
gas particles
have the greatest amount of energy. The temperature of a substance is a measure of the average kinetic energy of the particles. A change in phase may occur when the energy of the particles is changed.
What is the velocity of gas molecules?
So the average speed of a gas molecule is
about 500 m/sec
. This is roughly the speed of sound in a gas 340 m/sec.
Which gas has the highest molecular speed?
Observe that the gas with the lowest molar mass
(helium)
has the highest molecular speeds, while the gas with the highest molar mass (xenon) has the lowest molecular speeds. When we increase the molar mass, the most probable speed decreases (the highest point on the curve shifts to the left).
What is the rms speed of the atoms?
The root-mean-square speed measures the average speed of particles in a gas, defined as
vrms=√3RTM v r m s = 3 R T M
.
Which is most effective in changing a gas into a liquid?
The easy answer is
to lower the surrounding temperature
. When the temperature drops, energy will be transferred out of your gas atoms into the colder environment. When you reach the temperature of the condensation point, you become a liquid.
Why does a real gas not behave in an ideal way?
1:
Real Gases Do Not Obey the Ideal Gas Law
, Especially at High Pressures. … Under these conditions, the two basic assumptions behind the ideal gas law—namely, that gas molecules have negligible volume and that intermolecular interactions are negligible—are no longer valid. Figure 10.9.
What happens to a container of gas when the pressure is increased?
If the amount of gas in a container is increased,
the volume increases
. If the amount of gas in a container is decreased, the volume decreases. If you heat a gas you give the molecules more energy so they move faster.
