I need to figure out whether chemical equilibrium was established?

Question

Transfer Number

{Reactant Test Tube Volume mL} { Product Test Tube Volume (mL)}

1 40 mL 5 mL

2 36 mL 9 mL

3 32 mL 12 mL

4 28 mL 16 mL

5 26 mL 18 mL

6 23 mL 21 mL

7 21 mL 23 mL

8 19 mL 25 mL

9 17 mL 26 mL

10 15 mL 28 mL

11 15 mL 29 mL

12 15 mL 29 mL

13 14 mL 30 mL

14 14 mL 30 mL

15 13 mL 30 mL

16 13 mL 30 mL

18 13 mL 30 mL

19 13 mL 30 mL

20 13 mL 30 mL

1. also i need to know how i can tell if equilibrium was established and

2. i need to know: At equilibrium, the volume of reactants was _________ to/than the volume of products. greater than or less than and i need to know why

Answer 1

Oh i think so. Check out #'s 15-20. They are constant and reached an equillibrium. Rate of foward reaction (in this case volume) = rate of reverse reaction. The volume of reactants (13mL) is less than the volume of products (30mL). As far as why I cannot tell you w/o an equation, but gibbs free energy or enthalpy favors products. Or, the pressure was great enough to convert more moles of reactants to products (or vice versa).