Two monatomic ideal gases are in thermal equilibrium with ea

[Any Help]

Homework Statement

Two monatomic ideal gases are in thermal equilibrium with each other. Gas A is composed of molecules with mass m while gas B is composed of molecules with mass 4m. The ratio of the average translational kinetic energies KA/KB is:

Homework Equations

KE=0.5xmxVavarage^2
ATTEMPTS:]
KE!/KE2 all are constants except m then it will be 1/4
but the correct answer is one why?

 

[phyzguy]

What is temperature? What does it mean to be in thermal equilibrium?

 

[Any Help]

What is temperature? What does it mean to be in thermal equilibrium?

it means delta T=0 then delta Einternal=0

 

[phyzguy]

it means delta T=0 then delta Einternal=0

You didn't answer my question about what is temperature.

 

[Any Help]

You didn't answer my question about what is temperature.

Temperature is a measurement of how heat or cold an object is. It reflects the delta internal energy where the change in temprature will cause a change in internal energy.
Is that what you mean?

 

[phyzguy]

From the Wikipedia article on temperature:

"The kinetic theory offers a valuable but limited account of the behavior of the materials of macroscopic bodies, especially of fluids. It indicates the absolute temperature as proportional to the average kinetic energy of the random microscopic motions of those of their constituent microscopic particles, such as electrons, atoms, and molecules, that move freely within the material."

 

[Any Help]

From the Wikipedia article on temperature:

"The kinetic theory offers a valuable but limited account of the behavior of the materials of macroscopic bodies, especially of fluids. It indicates the absolute temperature as proportional to the average kinetic energy of the random microscopic motions of those of their constituent microscopic particles, such as electrons, atoms, and molecules, that move freely within the material."

okay, but also its proportional to mass

 

[phyzguy]

okay, but also its proportional to mass

No! It's not! Temperature is proportional to the average kinetic energy of the constituent particles. So if two gases have equal temperatures, they have equal average kinetic energies. So the heavier particles are moving slower.

 

[Any Help]

No! It's not! Temperature is proportional to the average kinetic energy of the constituent particles. So if two gases have equal temperatures, they have equal average kinetic energies. So the heavier particles are moving slower.

ah okay I got your point thanks