320.0℃ SO2Cl2 first order 8.70 hr

320.0℃ SO2Cl2 first order 8.70 hr



The first-order decomposition of SO2Cl2

to sulfur dioxide gas and chionine at 320.0℃

has a half-life of 8.70 hr.

SO2Cl2(g) → SO2(g) + Cl2(g)


SO2Cl2의 초기 압력 791 torr,

1.25 L 용기 속에서 분해 반응,

14시간 후에 남아 있는 SO2Cl2 분자의 수는?


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1차 반응의 반감기

t_1/2 = 0.693 / k

( 참고 https://ywpop.tistory.com/26 )


k = 0.693 / t_1/2

= 0.693 / (8.70 hr)

= 0.079655 /hr

= 0.0797 /hr



1차 반응 속도식

ln(P_t / P_0) = –k•t


P_t = e^(–k•t) × P_0

= e^(–0.0797×14) × 791

= 259 torr



PV = nRT 로부터,

( 참고 https://ywpop.tistory.com/3097 )


n = PV / RT

= [(259/760) (1.25)] / [(0.08206) (273.15 + 320.0)]

= 0.00875 mol



0.00875 mol × (6.022×10^23 개 / 1 mol)

= 5.27×10^21 개



답: 5.27×10^21 개




e^(–0.079655×14) × 791 = 259.3369


[(259.3369/760) (1.25)] / [(0.08206) (273.15 + 320.0)]

= 0.00876324 mol


0.00876324 × (6.022×10^23) = 5.28×10^21




[키워드] The first-order decomposition of SO2Cl2 to sulfur dioxide gas and chionine at 320℃ has a half-life of 8.75 hr.



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