The decomposition of sulfuryl chloride (SO2Cl2) is a first-order process. The ra

Question

The decomposition of sulfuryl chloride (SO2Cl2) is a first-order process. The rate constant for the decomposition at 660 K is 4.5 10-2 s-1.
(a) If we begin with an initial SO2Cl2 pressure of 320. torr, what is the pressure of this substance after 73 s?
______ torr
(b) At what time will the pressure of SO2Cl2 decline to one tenth its initial value?
______ s

By what factor will the pressure of sulfuryl chloride decrease after 8 half lives? Note: The answer wants this value: (320. torr)/value = final pressure after decay
_____value

Explanation / Answer

Integrated 1st order equation: ln(p) = ln(po) - kt, (a) ln(p) = ln(325 torr) - (0.045 /s) (66 s); Solving, p = 16.67 torr. (b) ln(32.5 torr) = ln(325 torr) - (0.045 /s) t; Solving, t = 51.2 s.

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