Chapter I review
Answers are for parents and teachers.
1
The volume of an ideal gas decreased 4 times at constant temperature. By what factor did the pressure and the density change?
Both rose 4 times.
2
A 24.93 l vessel contains 3 mol of gas at 300 K. What is the pressure in kPa? (R = 8.31 J/(mol·K))
300
3
At 500 K, what is the speed ratio v_H/v_O for hydrogen and oxygen molecules at the same temperature?
4
4
Write the names, constant quantities and laws of the three isoprocesses in a table.
Isothermal (T) Boyle–Mariotte pV = const; isobaric (p) Gay-Lussac V/T = const; isochoric (V) Charles p/T = const.
5
How is p = nkT obtained from the basic equation of MKT? Write briefly.
p = (2/3)nE_k and E_k = (3/2)kT; substituting the second into the first gives p = nkT.