已知H₂(g)、C₂H₄(g)和C₂H₅OH(l)的燃烧热分别是-285.8kJ?mol^-1、-1411.0kJ?mol^-1和-1366.8kJ?mol^-1，则由C₂H₄(g)和H₂O(l)反应生成C₂H₅OH(l)的△H为

  A.-44.2kJ?mol^-1                                B.+44.2kJ?mol^-1

  C.-330kJ?mol^-1                                 D.+330kJ?mol^-1

  A.-44.2kJ·mol^-1                                B.+44.2kJ·mol^-1

  C.-330kJ·mol^-1                                 D.+330kJ·mol^-1

已知H₂(g)、C₂H₄(g)和C₂H₅OH(1)的燃烧热分别是-285.8kJ·mol^-1、-1411.0kJ·mol^-1和-1366.8kJ·mol^-1,则由C₂H₄(g)和H₂O(l)反应生成C₂H₅OH(l)的△H为(   )

A．-44.2kJ·mol^-1                                          B．+44.2kJ·mlo^-1

C．-330kJ·mol^-1                                           D．+330kJ·mlo^-1

已知H2(g)、C2H4(g)和C2H5OH(1)的燃烧热分别是-285.8kJ??mol-1、-1411.0kJ??mol-1和

-1366.8kJ??mol-1,则由C2H4(g)和H2O(l)反应生成C2H5OH(l)的△H为(   )

A．-44.2kJ??mol-1        B．+44.2kJ??mlo-1

C．-330kJ??mol-1         D．+330kJ??mlo-1

已知H₂(g)、C₂H₄(g)和C₂H₅OH(1)的燃烧热分别是-285.8kJ·mol^-1、-1411.0kJ·mol^-1和-1366.8kJ·mol^-1,则由C₂H₄(g)和H₂O(l)反应生成C₂H₅OH(l)的△H为(   )

A．-44.2kJ·mol^-1          B．+44.2kJ·mlo^-1

C．-330kJ·mol^-1           D．+330kJ·mlo^-1