某有机物燃烧的产物只有CO2和H2O,完全燃烧消耗氧气与水的物质的量为一比一,则该有机物可能是?A:CH3OHB:CH3CHOC; CH3COOHD; CH3COOCH2CH3
问题描述:
某有机物燃烧的产物只有CO2和H2O,完全燃烧消耗氧气与水的物质的量为一比一,则该有机物可能是?
A:CH3OH
B:CH3CHO
C; CH3COOH
D; CH3COOCH2CH3
答
C 理由全在上面!
答
设分子式为CxHyOz
CxHyOz+(x+y/4-z/2)O2==xCO2+y/2H2O
所以x+y/4-z/2=y/2
所以x-y/4-z/2=0
4x=y+2z
A,CH4O
B,C2H4O
C,C2H4O2
D,C4H8O2
所以选C