Equilibrium CT (1)

Question 1

When volume increases what are the changes in the equilibrium?

Answer 1

• When volume of a reacting system is inc.
• has effect of dec. the pressure of gas substances only
• particles are further apart hence collide less frequently
• Inc volume = has no effect on solids or liquids in reacting system

Question 2

When volume decreases what are the changes in the equilibrium?

Answer 2

• When volume of a reacting system is dec.
• has effect of inc. the pressure of gas substances only
• particles are closer together hence collide more frequently
• Dec volume = has no effect on solids or liquids in reacting system

Question 3

When pressure increases what are the changes in the equilibrium?

Answer 3

• When pressure is inc.
• r.o.r inc. as particles experience more collisions as they’re closer together
• side of the reaction with most gaseous molecules will experience greater inc. in collisions
• reaction rate will inc. more than the side of reaction with fewer gaseous molecules
• reaction shifts to the side with fewer gas particles

Question 4

When pressure decreases what are the changes in the equilibrium?

Answer 4

• When pressure is dec.
• r.o.r dec. as particles experience fewer collisions as they’re further apart
• side of the reaction with most gaseous molecules will experience greater dec. in collisions
• reaction rate will dec. more than the side of reaction with fewer gaseous molecules
• reaction shifts to the side with more gas particles

Question 5

When temp. increases in an exo. reaction what are the changes in the equilibrium?

Answer 5

• When temperature of exo. reaction is inc.
  
  • -> avg. kinetic energy of particles will inc.
  • -> greater proportion of particles will inc. (Ea)
  • -> rates of both forward and reverse reactions inc.
  • -> rate of reverse (endo) reaction inc. > than forward reaction as an avg. kinetic energy of particles enables them to overcome high Ea of reverse reaction
• reaction shifts to the left (endo)

Question 6

When temp. increases in an endo. reaction what are the changes in the equilibrium?

Answer 6

• When temperature of endo. reaction is inc.
  
  • -> avg. kinetic energy of particles will inc.
  • -> greater proportion of particles will inc. (Ea)
  • -> there will be an inc. in collisions between particles
  • -> rates of both forward and reverse reactions inc.
  • -> rate of forward (exo) reaction inc. > than reverse reaction as an inc. in avg. kinetic energy of particles enables them to overcome high Ea of reverse reaction
• reaction shifts to the right (exo)

Question 7

When temp. decreases in an exo. reaction what are the changes in the equilibrium?

Answer 7

• When temperature of exo. reaction is dec.
  –> avg. kinetic energy of particles will dec.
  –> smaller proportion of particles will have enough
  energy to get past Ea
  –> rates of both forward and reverse reactions dec.
  –> rate of reverse reaction dec. > than forward reaction as an dec. in avg. kinetic energy of particles prohibit them to overcome high Ea of reverse reaction
• reaction shifts to the right (exo)

Question 8

When temp. decreases in an endo. reaction what are the changes in the equilibrium?

Answer 8

• When temperature of endo. reaction is dec.
  –> avg. kinetic energy of particles will dec.
  –> smaller proportion of particles will have enough
  energy to get past Ea
  –> rates of both forward and reverse reactions dec.
  –> rate of forward reaction dec. > than reverse reaction as an dec. in avg. kinetic energy of particles prohibit them to overcome high Ea of reverse reaction
• reaction shifts to the left (endo)