Question

1.

a. The gas phase decomposition of sulfuryl chloride at 600 K

SO₂Cl₂(g) -------> SO₂(g) + Cl₂(g)

is first order in SO₂Cl₂ with a rate constant of 2.80×10^-3 min^-1.

If the initial concentration of SO₂Cl₂ is 5.84×10^-3 M, the concentration of SO₂Cl₂ will be _____M after 618 min have passed.

b. The gas phase decomposition of dimethyl ether at 500 °C

CH₃OCH₃(g)-------->CH₄(g) + H₂(g) + CO(g)
is first order in CH₃OCH₃ with a rate constant of 4.00×10^-4 s^-1.
If the initial concentration of CH₃OCH₃ is 3.03×10^-2 M, the concentration of CH₃OCH₃ will be 4.51×10^-3 M after ______s have passed.

c. The gas phase decomposition of dinitrogen pentoxide at 335 K

N₂O₅(g)------->2 NO₂(g) + ½ O₂(g)

is first order in N₂O₅.
During one experiment it was found that when the initial concentration of N₂O₅ was 0.191 M, the concentration of N₂O₅ dropped to 3.53×10^-2 M after 239 s had passed.
Based on this experiment, the rate constant for the reaction is _____s^-1.

Answer 1