Equilibrium

Question 1

The enthalpy change for a reaction is quite small. By reference to the number and type of bonds broken and made, explain how this might have been predicted.

Answer 1

• Similar types of bond broken and made
• Same number of the bonds broken and made

Question 2

State why there wouldn’t be any units in the expression for Kc

Answer 2

Units cancel as equal number of moles on each side of equation

Question 3

Dynamic equilibrium

Answer 3

• Forward and backward reactions proceeding at equal rate
• Conc of reactants and products remain constant

Question 4

Why isn’t there any units for K for this reaction:

A + 2B→ 3C

Answer 4

• Units cancel out
• As equal moles on both side

Question 5

A + 2B→ 3C exothermic

How will increasing the temp affect the time taken to reach equlibrium

Answer 5

• reduces the time