Question

Which of the following are same for all ideal gas at same $STP$ ?

• A. Loschmidt's number
• B. Kinetic energy of 1 mole gas
• C. Number of molecules in 1 mole
• D. Average kinetic energy

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A Loschmidt's number
B Kinetic energy of 1 mole gas
C Number of molecules in 1 mole
D Average kinetic energy

A number of molecules in 1 mole for all ideal gas at same $STP$ is $6.023\times {10}^{23}$.
The Loschmidt's number is the number of particles (atoms or molecules) of an ideal gas in a given volume. It is usually quoted at standard temperature and pressure and value is $2.68\times {10}^{25}$ per cubic meter at $0^{0}C$ and 1 $atm$.
Similarly, average kinetic energy per molecule is $KE=\frac{3}{2}KT$
And for one-mole gas, kinetic energy is $KE=\frac{3}{2}RT$