Rates of Change in Chemical Reactions

For the reaction A+ 3B --> 2C, how does the rate of disappearance of B compare to the rate of production of C?

• the rate of disappearance of B is 1/2 the rate of appearance of C

• the rate of disappearance of B is 3/2 the rate of appearance of C

• the rate of disappearance of B is 2/3 the rate of appearance of C

• the rate of disappearance of B is 1/3 the rate of appearance of C

For the reaction 2A + 3B → 4C + 5D, the rate of the reaction in terms of ΔA would be written as:

• –ΔA/Δt

• –1/2 ΔA/Δt

• +ΔA/Δt

• +1/2 ΔA/Δt

• –2 ΔA/Δt

For the reaction 2A + 3B → 4C + 5D, the rate of the reaction in terms of ΔB would be written as

• –ΔB/Δt

• +ΔB/Δt

• –1/3 ΔB/Δt

• +1/3 ΔB/Δt

• –3 ΔB/Δt

For the reaction 2A + 3B → 4C + 5D, the rate of the reaction in terms of ΔC would be written as

• +ΔC/Δt

• +4 ΔC/Δt

• +1/4 ΔC/Δt

• –4 ΔC/Δt

• –1/4 ΔC/Δt

In the combustion of methane, CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O (g), which reactant has the greatest rate of disappearance?

• CH₄

• O₂

• CO₂

• H₂O

• CH₄ and O₂ have the same rate of disappearance.