task : le chatelier principle

1.      Known to the following reaction:

Fe ^ (3 +) (aq) + SCN ^ - (aq) ⇌ 〖Fe (SCN)〗 ^ (2 +) (aq)

Estimate the equilibrium shifts toward equilibrium if it:

Fe3 + ions are added

Added ion-HPO42

Explain!

2.      Notice the following equilibrium reaction:

2NO2 (g) ⇌ N2O4 (g) ΔH = -58.8 kJ

If the system into equilibrium temperature and pressure were enlarged, explain what happened?

3.      2NO2 (g) ⇌ N2O4 (g) ΔH = -59.8 kJ

At this equilibrium, helium gas was added until the total pressure of twice the original pressure, explain what happens at equilibrium?