Question

a sample of c₄h₁₀(g) is placed in a rigid vessel with a movable piston. the volume of the gas is reduced by moving the piston downward while the temperature is maintained at 25 °c as shown above. the pressure of the gas versus its volume is plotted in the graph below. which of the following best explains the increase in pressure of the c₄h₁₀(g) when its volume is decreased from 0.50 l to 0.21 l? a the molecules strike the walls of the vessel more frequently. b the molecules strike the walls of the vessel with different orientations. c the molecules strike the walls of the vessel with greater force. d the molecules decompose to produce a greater number of particles.

Explanation:

According to the kinetic - molecular theory of gases, when the volume of a gas is decreased at constant temperature, the number of gas molecules per unit volume increases. This causes the gas molecules to strike the walls of the vessel more frequently, leading to an increase in pressure.

Answer:

A. The molecules strike the walls of the vessel more frequently