Chemistry 30

During the combustion of methane, CH₄, shown by the reaction

CH_4(g) + O_2(g) → CO_2(g) + H₂O_(g)

the concentration of methane was measured at various time intervals and the following results were obtained:

Calculate the average rate of loss of methane during the 10 to 40 second time period.

Consider the following reaction: N_2(g) + 3 H_2(g) → 2 NH_3(g)

If the rate of decomposition of N_2(g) is 0.03 mol ·L^-1· s^-1, what is the rate of formation of NH_3(g)?

Measurements taken during the reaction CO_(g) + NO_2(g) → CO_2(g) + NO_(g)

showed a concentration of carbon monoxide of 0.019 mol ·L^-1·s^-1 at 27 min and of 0.013 mol · L^-1· s^-1 at 45 min. Calculate the average rate, over this 18 min period, of each of the following:

a. the loss of carbon monoxide, CO

b. the gain of carbon dioxide, CO₂

In the following reaction the average rate of loss of carbon monoxide, over a set period, is 0.15 mol · L^-1· s^-1.

2 CO_(g) → CO_2(g) + C_(s)

Calculate the average rate of production of carbon dioxide, CO_2(g), during the same period.