¼òµ¥»Ø´ð: ʲôÊÇìÊ? ·Çºãѹ¹ý³ÌÊÇ·ñÓÐìʱä? ÓеĻ°, µÈÓÚʲô ? 3.(±¾Ìâ10·Ö) 3470
N2H4 ºÍ H2O2 µÄ»ìºÏÎï¿É×÷Ϊ»ð¼ýȼÁÏ, ËüÃǵķ´Ó¦ÈçÏÂ: N2H4(g) + 2H2O2(g) == N2(g) + 4H2O(g) (1) ÈôÒÑÖª N2H4(g) µÄ DfHm¡ã = 95.8 kJ¡¤mol-1;
·´Ó¦ H2(g) + H2O2(g) == 2H2O(g) µÄ DrHm¡ã = -348.6 kJ¡¤mol-1, ÇóÉÏÊö·´Ó¦µÄ DrHm¡ã
(2) ÒÑÖª DH¡ã( H©¤H) = 436 kJ¡¤mol-1, DH¡ã (H©¤O) = 465 kJ¡¤mol-1 Çó H2O2 ÖÐ O©¤O ¼üµÄ¼üÄÜ¡£
4.(±¾Ìâ 5·Ö) 0446
²Î¿¼ÏÂÃ漸ÖÖµªµÄÑõ»¯ÎïÔÚ298KµÄDfHm¡ã ºÍDfGm¡ã Êý¾Ý, ÍƶÏÆäÖÐÄÜÔÚ¸ßÎÂ
ÏÂÓÉÔªËص¥ÖʺϳÉÄÄÖÖµªÑõ»¯ºÏÎï ?
DfHm¡ã /kJ¡¤mol-1 DfGm¡ã /kJ¡¤mol-1 (1) N2 O(g) +82.00 +104.20 (2) NO(g) +90.25 +86.57 (3) N2 O3(g) +82.72 +139.41 (4) NO2(g) +33.18 +51.36
5.(±¾Ìâ 5·Ö) 0469
ÔÚÆøÏà·´Ó¦ÖÐ DrGm¡ã ºÍ DrGmÓкβ»Í¬? ÔÚÒºÌåµÄÕý³£·Ðµãʱ, ÄÜ·ñÓÃ
DrGm¡ã =0 À´±íʾ¸ÃÌåϵ´ïµ½Æ½ºâ? Ϊʲô?
6.(±¾Ìâ 5·Ö) 3461
ÏÂÁÐÁ½¸ö·´Ó¦ÔÚ 298 KºÍ±ê׼̬ʱ¾ùΪ·Ç×Ô·¢·´Ó¦, ÆäÖÐÔÚ¸ßÎÂÏÂÈÔΪ·Ç×Ô
·¢·´Ó¦µÄÊÇÄÄÒ»¸ö? Ϊʲô?
(1) Fe2O3(s) + 3/2C(ʯī) == 2Fe(s) + 3/2CO2(g) (2) 6C(ʯī) + 6H2O(g) == C6H12O6(s)
7.(±¾Ìâ10·Ö) 3460
ÔÚʵ¼Ê¿ÆÑÐÓëÉú²úÖÐ, »¯Ñ§·´Ó¦Ò»°ã¶¼ÒªÔÚ¼ÓÈÈÌõ¼þϽøÐÐ, ´ÓÈÈÁ¦Ñ§Ó붯
Á¦Ñ§Á½·½ÃæÖ¸³ö¼ÓÈȵÄÔÒò(¼ÙÉèDrHm¡ã ¡¢DrSm¡ã ¡¢ Ea ²»Ëæζȱ仯)¡£ÁíÍâ,
Ö¸³öÏÂÁм¸¸ö·´Ó¦ÔÚ¸ßÎÂϽøÐÐÓÐÎÞÈÈÁ¦Ñ§µÄÄ¿µÄ ¡£Ìá¸ß·´Ó¦Î¶ȶԲúÂÊ(»òת »¯ÂÊ)ÓкÎÓ°Ïì¡£
·´ Ó¦ DrHm¡ã /kJ¡¤mol-1 DrSm¡ã /kJ¡¤mol-1¡¤K-1
¢Ù CaCO3(s) £½ CaO(s) + CO2(g) 177.85 0.16 ¢Ú N2(g) + 3H2(g) £½ 2NH3(g) -92.38 -0.20