Physics, 30.08.2019 21:10 isaiahcannon5709

Which of the following statements are true? check all that apply.-the average speed of gas molecules is independent of temperature.-there are gas molecules that move slower than the average.-the average speed of gas molecules increases with increasing temperature.-the average kinetic energy of gas molecules decreases with decreasing temperature.-the temperature of a gas sample is related to the average kinetic energy.

Answers: 2

Show answers

Answers

Answer from: cowerdwhisper23

The average speed of gas molecules is independent of temperature. (False)

There are gas molecules that move slower than the average (True)

The average speed of gas molecules increases with increasing temperature. (True)

The average kinetic energy of gas molecules decreases with decreasing temperature. (True)

The temperature of a gas sample is related to the average kinetic energy. (True)

Explanation:

The average speed of gas molecules is independent of temperature. (False)

The equation for the average speed of gas molecules is giving as:

$\bar{v} = \sqrt{\frac{3 \kappa T}{m}}$ (1)

Where $\kappa$ is the Boltzmann's Constant, m is the mass of a gas molecule and T is the temperature.

The expression for the average speed of gas molecules is get by using the kinetic theory and the ideal gas law. Equation 1 shows that the average velocity is directly proportional to the temperature, So when the temperature increase, the average velocity will increase too. That leaves clear than the average velocity is always dependent of the temperature.

There are gas molecules that move slower than the average (True)

Gas molecules are in constant movement with aleatory directions. That leads to different collision between particles and the walls of the container, Some of the particles will move faster and other slower as a consequence of the different collisions.

So it is correct to say that there are gas molecules that move slower than the average.

The average speed of gas molecules increases with increasing temperature. (True)

As it was already demonstrated in equation 1.

The average kinetic energy of gas molecules decreases with decreasing temperature. (True)

The equation for the average kinetic energy is giving as:

$\overline{Ec} = \frac{3}{2} \kappa T$ (2)

Which indicates that the average kinetic energy is directly proportional to the temperature. That means that as the kinetic energy increase the temperature of the whole gas will do it too. So the kinetic energy will decrease with decreasing temperature.

The temperature of a gas sample is related to the average kinetic energy. (True)

It can be understood with the same approach from the explanation above, just rewriting equation 2 for the temperature (T):

$T = \frac{2}{3}(\frac{\overline{Ec}}{\kappa})$ (3)

Answer from: Quest

wavelength divides in half and speed stays the same.

Answer from: Quest

The correct answer should be b let me know if i’m wrong

Another question on Physics

Physics, 22.06.2019 05:30

Anybody wanna ? (picture included? )

Answers: 1

Answer

Physics, 22.06.2019 06:30

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Answers: 1

Answer

Physics, 22.06.2019 10:30

Which two particles are found in the center of an atom

Answers: 1

Answer

Physics, 22.06.2019 22:00

The inside surface of a cylindrical-shaped cave of inner diameter 1.0 m is continuously covered with a very thin layer of water. the cave is very long and it is open on both ends. the water on the cave surface is at a constant temperature of 15.5 °c. the cave is constantly exposed to wind such that 15.5 °c air flows through the cave at 4.5 m/s. the kinematic viscosity of the air is 14.66 x 10-6 m2/s and the molecular diffusion coefficient of water vapor in the air is 0.239 x 10-4 m2/s. because the cave diameter is so large, the flow of wind down the length of the cave, in the x direction, can be treated like it is external flow and the cave surface can be approximated as flat where appropriate. calculate the x value, in a) the transition to turbulent flow occurs at rex meters, where the air flow transitions from laminar to turbulent along the inside surface of the cave b) calculate the x value, in meters, where the bulk steady state concentration of water vapor in the air flowing in the cave is 10% of the saturation concentration. assume the air at the surface of the water layer is 100% saturated with water vapor. assume the wind entering the cave contained no moisture before it entered the cave. take into account the transition from laminar to turbulent flow when solving part b

Answers: 1

Answer

You know the right answer?

Which of the following statements are true? check all that apply.-the average speed of gas molecules...

Questions