①CH3CH2Cl+H2O CH3CH2OH+HCl
②CH3COOH+CH3CH2OH CH3COOCH2CH3+H2O
③CH3CH2OH CH2=CH2↑+H2O
④CH3COOCH2CH3+H2O CH3COOH+CH3CH2OH
⑤CH4+Cl2 CH3Cl+HCl