Which gas has the lowest average 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.

Which gas has the greatest average molecular speed?

The average gas velocity is inversely proportional to the molar mass M. This means that the lower the M, the higher the average gas velocity. Methane (CH4) ( C H 4 ) has the lowest molar mass (16.04 g/mol) of the 5 gases. Therefore, methane has the highest average molecular speed.

Which has the lowest value at a given temperature for a given gas?

absolute zero, temperature at which a thermodynamic system has the lowest energy.

Which gas has the lowest average molecular speed at 298 K?

CO2
Thus, at 298 K CO2 has the lowest average molecular speed.

Which of the following gases has the lowest average speed at 25?

The gas with the highest molar mass is H2Se, which means it will have the lowest average speed. The answer is a. H2Se.

Which gas has the lowest rate of effusion?

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.

Which gas molecules have the highest average speed at this temperature?

Nitrogen and helium, at 100°C , have the highest average kinetic energy because they have the highest temperature.

What is significant about the temperature of 0K?

What is significant about the temperature of 0K? It is the temperature at which atoms stop moving. A temperature of 0K is absolute zero and is the point at which motion of atoms stop. space occupied by any sample of matter.

What is the limiting low temperature of a physical object?

Absolute zero is the lowest limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as zero kelvins.

Which does not change during compression of a gas at constant temperature?

Statement -I : There is no change in enthalpy of an ideal gas during compression at constant temperature. Statement-II: Enthalpy of an ideal gas is a function of temperature and pressure.

Which of the following gases has the highest average speed at 400k?

O2 should be the correct answer for the reasoning given.

For which of the following gases would the molecules be moving the fastest on average at 25 C?

Recall that Graham’s Law of Effusion allows us to compare the rate of effusion of two gases. Graham’s Law states that the rate of effusion of a gas is inversely proportional to its molar mass. Therefore, D) CH4 will have the greatest average molecular speed at 25°C.