Choose the correct answer and explain why

a) At 100C and 1 atm, which processes about water are in equilibrium?

• melting and boiling

• sublimating and depositing

• condensing and boiling

• there is no equilibrium

b) A sugar cube dissolved in water quickly. Which processes with the sugar are in EQ?

• dissolving and crystallizing

• sublimating and depositing

• condensing and boiling

• there is no equilibrium

c) In a sealed can of Coca Cola in the fridge, which processes of CO2 are in EQ?

• dissolving and escaping from water

• freezing and melting

• condensing and boiling

• there is no equilibrium

d) In an explosion of TNT, which processes about TNT are in EQ?

• Ek (kinetic energy) and Ep (potential energy)

• rf (forward rate) and rr (reverse rate)

• kf (forward constant) and kr (reverse constant)

• there is no equilibrium

e) In an ICE table, what is the unit of all values? (kg, L...)

• mol

• L

• mol x L

• mol / L

f) In a solution, A 2B. If [A] reduces by "x", the [B]...

• increases by 0.5x

• increases by 2x

• reduces by x

• reduces by 3x

g) In a solution, A 2B. If [A] increases by "x", the [B]...

• increases by 0.5x

• increases by 2x

• reduces by 0.5x

• reduces by 2x

h) In a solution, 2A 3B. If [A] reduces by "x", the [B]...

• increases by x

• increases by 1.5x

• reduces by 6x

• reduces by 0.67x

i) A B. Keq = 1. Initially [A] = 1M, [B] = 0M. If "x" M of B formed at equilibrium...

• (1 + x) / (1 - x) = 1

• x / (1 - x) = 1

• (1 + x) / x = 1

• x / 1 = 1

j) A 2B. Keq = 2. Initially [A] = [B] = 1M. If "x" M of A is consumed to reach EQ

• (1 + x) / (1 - x) = 1

• (1 + 2x)2 / (1 - x) = 2

• (1 + 2x) / (1 - 2x) = 2

• (1 + x) / (1 - 2x)2 = 2