At 518∘C the rate of decomposition of a sample of gaseous acetaldehyde initially at a pressure of 363 Torr, was 1.00 Torr s−1 when 5% had reacted and 0.5 Torr s−1 when 33% had reacted. The order of the reaction is:
A
0.0
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B
2
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C
3
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D
1
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Solution
The correct option is B 2 r1r2=[a−x1a−x2]m 10.5=[0.950.77]m 2=(1.41)m log2=mlog(1.41) log2log1.41=m m=0.30100.149 ~ 2