Question

1. there are 40 liters of helium in a balloon at a temperature of 100 k. if the temperature of the balloon is increased to 200 k, what will be the new volume of the balloon?

80 l
54 l
45 l
45.33 l

1. pressure is caused by ____ between gas molecules.

collisions
attractive forces
mass

1. which among the following is true about kinetic molecular theory?

gases exert a force on each other
gas particles are not in constant random motion
most of the volume of gas is empty space
gas particles attract each other

Explanation:

4.

Step1: Identify the gas - law formula

For a given amount of gas at constant pressure, Charles's law is used, $V_1/T_1 = V_2/T_2$.

Step2: Assign values

$V_1 = 40$ L, $T_1=100$ K, $T_2 = 200$ K. We need to find $V_2$.

Step3: Rearrange the formula to solve for $V_2$

$V_2=\frac{V_1T_2}{T_1}$.

Step4: Substitute values

$V_2=\frac{40\times200}{100}=80$ L.

According to the kinetic - molecular theory of gases, pressure is caused by the collisions of gas molecules with the walls of the container and with each other.

The kinetic - molecular theory of gases states that most of the volume of a gas is empty space, gas particles are in constant random motion, there are no attractive or repulsive forces between gas particles (except during collisions), and gases do not exert a non - collisional force on each other.

Answer:

80 L

15.