Question

1. for a chemical system involving a gas, which of the following sets of conditions affects the equilibrium position?

a. temperature, pressure, and particle size
b. pressure, temperature, and concentration
c. concentration, temperature, and particle size
d. particle size, pressure, and concentration
e. none of the above

Explanation:

To determine which conditions affect the equilibrium position of a chemical system involving a gas, we use Le Chatelier's principle. Le Chatelier's principle states that changes in concentration, temperature, and pressure (for gaseous systems) can shift the equilibrium position. Particle size affects reaction rate (via surface area) but not equilibrium position.

• Option a: Particle size does not affect equilibrium, so a is incorrect.
• Option b: Pressure (for gases), temperature, and concentration all affect equilibrium position according to Le Chatelier's principle.
• Option c: Particle size does not affect equilibrium, so c is incorrect.
• Option d: Particle size does not affect equilibrium, so d is incorrect.
• Option e: Since option b is correct, e is incorrect.

Answer:

b. Pressure, temperature, and concentration