Reactions involving Gases

The video tutorial explains the concept of gas concentration as the ratio of gas molecules per unit volume. It describes how pressure affects gas concentration by decreasing volume and increasing the number of molecules in a given space. The equilibrium constant for gases is expressed in terms of partial pressures, calculated using the ideal gas equation PV = NRT. The tutorial also covers the equilibrium reaction of hydrogen iodide formation from hydrogen and iodine gases, explaining how the equilibrium constant KP is derived from partial pressures.

What happens to the concentration of gas when pressure is applied to a piston-fitted container?

• It fluctuates randomly.

• It increases.

• It remains the same.

• It decreases.

Which equation is used to calculate the partial pressure of a gas?

• P = CRT

• P = VRT

• P = NRT

• P = ART

At constant temperature, the partial pressure of a gas is directly proportional to which of the following?

• Mass of the gas

• Volume of the gas

• Concentration of the gas

• Temperature of the gas

In the reaction of hydrogen and iodine to form hydrogen iodide, what is the equilibrium constant expression?

• KP = Phi^2 / (PH2 * PI2)

• KP = (PH2 + PI2) / Phi^2

• KP = PH2 * PI2 / Phi^2

• KP = Phi / (PH2 + PI2)

What is the partial pressure of hydrogen iodide in the equilibrium reaction?

• PH2

• PI2

• Phi

• PHi2