Question

¢ñ£®ÔÚijѹǿºã¶¨µÄÃܱÕÈÝÆ÷ÖмÓÈë2molN₂ºÍ4molH₂£¬·¢ÉúÈçÏ·´Ó¦£º
N₂£¨g£©+3H₂£¨g£©?2NH₃£¨g£©£»¡÷H=-92.4kJ/mol
´ïµ½Æ½ºâʱ£¬Ìå»ýΪ·´Ó¦Ç°µÄ

2

3

£®Çó£º
£¨1£©´ïµ½Æ½ºâʱ£¬N₂µÄת»¯ÂÊΪ

 

£®
£¨2£©ÈôÏò¸ÃÈÝÆ÷ÖмÓÈëa mol N₂¡¢b mol H₂¡¢c mol NH₃£¬ÇÒa¡¢b¡¢c¾ùΪÕýÊý£¬ÔÚÏàͬÌõ¼þÏ´ﵽƽºâʱ£¬»ìºÏÎïÖи÷×é·ÖµÄÎïÖʵÄÁ¿ÓëÉÏÊöƽºâÏàͬ£®ÊԱȽϷ´Ó¦·Å³öµÄÄÜÁ¿£º£¨1£©

 

£¨2£©£¨£¾¡±¡¢¡°£¼¡±»ò¡°=¡±£©£®
¢ò£®Èô½«2molN₂ºÍ4molH₂·ÅÈëÆðʼÌå»ýÏàͬµÄºãÈÝÈÝÆ÷ÖУ¬ÔÚÓë¢ñÏàͬµÄζÈÏ´ﵽƽºâ£®ÊԱȽÏƽºâʱNH₃µÄŨ¶È£º¢ñ

 

¢ò£¨Ìî¡°£¾¡±¡¢¡°£¼¡±»ò¡°=¡±£©£®

Answer 1

¿¼µã£º»¯Ñ§Æ½ºâµÄ¼ÆËã

רÌ⣺»¯Ñ§Æ½ºâרÌâ

·ÖÎö£º¢ñ£®£¨1£©Ìå»ýÖ®±ÈµÈÓÚÎïÖʵÄÁ¿Ö®±È£¬¾Ý´Ë¼ÆËã·´Ó¦ºó»ìºÏÆøÌå×ܵÄÎïÖʵÄÁ¿£¬ÀûÓòîÁ¿·¨¼ÆËã²Î¼Ó·´Ó¦µÄµªÆøµÄÎïÖʵÄÁ¿£¬ÔÙ¸ù¾Ýת»¯Âʶ¨Òå¼ÆË㣻
£¨2£©¿ªÊ¼¼ÓÈëa mol N₂¡¢b mol H₂¡¢c mol NH₃£¬ÔÚÏàͬÌõ¼þÏ´ﵽƽºâʱ£¬»ìºÏÎïÖи÷×é·ÖµÄÎïÖʵÄÁ¿ÓëԭƽºâÏàͬ£¬ÎªµÈЧƽºâ£¬°´»¯Ñ§¼ÆÁ¿Êýת»¯µ½×ó±ßÂú×㵪ÆøΪ2mol¡¢ÇâÆøΪ4mol£¬£¨2£©ÖÐÓÉÓÚ°±Æø´æÔÚ£¬¹Ê²Î¼Ó·´Ó¦µÄµªÆøµÄÎïÖʵÄÁ¿±È£¨1£©ÖÐÉÙ£»
¢ò£®Èô½«2molN₂ºÍ4molH₂·ÅÈëÆðʼÌå»ýÏàͬµÄºãÈÝÈÝÆ÷ÖУ¬ÔÚÓë¢ñÏàͬµÄζÈÏ´ﵽƽºâ£¬µÈЧΪÔÚ¢ñƽºâ»ù´¡ÉÏÔö´óÌå»ý½µµÍѹǿ£¬Æ½ºâʱŨ¶È»ìºÏÆøÌåŨ¶È½µµÍ£®

½â´ð£º ½â£º¢ñ£®£¨1£©Ìå»ýÖ®±ÈµÈÓÚÎïÖʵÄÁ¿Ö®±È£¬¹Êƽºâºó·´Ó¦»ìºÏÆøÌå×ܵÄÎïÖʵÄÁ¿Îª£¨2mol+4mol£©¡Á

2

3

=4mol£¬
Ôò£ºN₂£¨g£©+3H₂£¨g£©?2NH₃£¨g£© ÎïÖʵÄÁ¿¼õÉÙ
    1                           2
   n£¨N₂£©                    6mol-4mol=2mol
¹Ên£¨N₂£©=1mol£¬µªÆøµÄת»¯ÂÊ=

1mol

2mol

¡Á100%=50%£¬
¹Ê´ð°¸Îª£º50%£»
£¨2£©¿ªÊ¼¼ÓÈëa mol N₂¡¢b mol H₂¡¢c mol NH₃£¬ÔÚÏàͬÌõ¼þÏ´ﵽƽºâʱ£¬»ìºÏÎïÖи÷×é·ÖµÄÎïÖʵÄÁ¿ÓëԭƽºâÏàͬ£¬ÎªµÈЧƽºâ£¬°´»¯Ñ§¼ÆÁ¿Êýת»¯µ½×ó±ßÂú×㵪ÆøΪ2mol¡¢ÇâÆøΪ4mol£¬£¨2£©ÖÐÓÉÓÚ°±Æø´æÔÚ£¬¹Ê²Î¼Ó·´Ó¦µÄµªÆøµÄÎïÖʵÄÁ¿±È£¨1£©ÖÐÉÙ£¬ËùÒԷųöµÄÈÈÁ¿£¨1£©£¾£¨2£©£¬
¹Ê´ð°¸Îª£º£¾£»
¢ò£®Èô½«2molN₂ºÍ4molH₂·ÅÈëÆðʼÌå»ýÏàͬµÄºãÈÝÈÝÆ÷ÖУ¬ÔÚÓë¢ñÏàͬµÄζÈÏ´ﵽƽºâ£¬µÈЧΪÔÚ¢ñƽºâ»ù´¡ÉÏÔö´óÌå»ý½µµÍѹǿ£¬Æ½ºâʱŨ¶È»ìºÏÆøÌåŨ¶È½µµÍ£¬Æ½ºâʱNH₃µÄŨ¶È£º¢ñ£¾¢ò£¬
¹Ê´ð°¸Îª£º£¾£®

µãÆÀ£º±¾Ì⿼²é»¯Ñ§Æ½ºâ¼ÆËã¡¢µÈЧƽºâµÈ£¬ÄѶÈÖеȣ¬×¢ÒâÀí½âÕÆÎÕµÈЧƽºâ¹æÂÉ£®