Question

(1/3)在脱硫过程中废气的污染物数量P mg/L与时间t的关系为P=Po乘e^(-kt) 如果在前两个小时消除了10%

Answer 1

P5/P0=e^-5k=0.9

-k=1/5ln0.9

P=P0e^(1/5ln0.9*t)

P10/P0=e^(1/5ln0.9*10)=e^(2ln0.9)=e^ln0.81=0.81=81%

P/Po=e^(1/5ln0.9*t)=1/2

1/5ln0.9*t=ln0.5

t=5ln0.5/ln0.9=5*0.6931/0.1053=32.89

33小时