Solution Found!
Answer: A flask contains a mixture of neon (Ne), krypton
Chapter 18, Problem 30E(choose chapter or problem)
A flask contains a mixture of neon (Ne), krypton (Kr), and radon (Rn) gases. Compare (a) the average kinetic energies of the three types of atoms and (b) the root-mean-square speeds. (Hint: Appendix D shows the molar mass (in g/mol) of each element under the chemical symbol for that element.)
Questions & Answers
QUESTION:
A flask contains a mixture of neon (Ne), krypton (Kr), and radon (Rn) gases. Compare (a) the average kinetic energies of the three types of atoms and (b) the root-mean-square speeds. (Hint: Appendix D shows the molar mass (in g/mol) of each element under the chemical symbol for that element.)
ANSWER:Solution to 30E
Step 1
M(Ne)=20.18g/mol
M(Kr)=83.80 g/mol
M(Rn)=222g/mol
Average kinetic energy of molecules is
Thus average kinetic energy depends upon the temperature of the gas.
- Since Neon, Krypton, and Radon are in a container with a temperature of T kelvin, the average kinetic energies of all three gases will be same.
KE(Ne)=KE(Kr)=KE(Rn)