Author Question: Which of the following occurs when the temperature of a gas rises? 1. The kinetic activity of the ... (Read 69 times)

sc00by25 · **on:** Jul 16, 2018

Which of the following occurs when the temperature of a gas rises? 1. The kinetic activity of the gas increases. 2. The rate of molecular collisions increases. 3. The pressure exerted by the gas rises.

a. 1, 2, and 3
b. 1 and 2 only
c. 2 and 3 only
d. 3 only

Question 2

According to Avogadro's law, which of the following is/are TRUE?

1. One gram of any substance contains the same number of particles.
2. Equal volumes of gases at standard temperature, standard pressure, dry (STPD) have the same number of molecules.
3. Equal numbers of gas molecules at STPD occupy the same volume.
a. 1 and 2 only
b. 1, 2, and 3
c. 2 and 3 only
d. 1 only

isabelt_18 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: A
The velocity of gas molecules is directly proportional to temperature. As a gas is warmed, its ki-netic activity increases, its molecular collisions increase, and its pressure rises.

Answer to Question 2

ANS: D
Avogadro's law states that the 1-g atomic weight of any substance contains exactly the same number of atoms, molecules, or ions.