ÌâÄ¿ÄÚÈÝ
ÔÚ25¡æºÍ101kPaʱ£¬ÓÐÏÂÁз´Ó¦µÄÈÈ»¯Ñ§·½³Ìʽ
H2£¨g£©+
O2£¨g£©¨TH2O£¨g£©¡÷H=-241.8kJ/mol£»
H2£¨g£©+
O2£¨g£©¨TH2O£¨1£©¡÷H=-285.8kJ/mol£®
ÒÔÏÂ˵·¨ÖдíÎóµÄÊÇ£¨¡¡¡¡£©
H2£¨g£©+
1 |
2 |
H2£¨g£©+
1 |
2 |
ÒÔÏÂ˵·¨ÖдíÎóµÄÊÇ£¨¡¡¡¡£©
·ÖÎö£ºÈÈ»¯Ñ§·½³ÌʽÊDZíʾ»¯Ñ§·´Ó¦ÖеÄÎïÖʱ仯ºÍìʱ䣨ÄÜÁ¿±ä»¯£©µÄ·½³Ìʽ£®¡÷HΪ¡°-¡±Îª·ÅÈÈ·´Ó¦£¬¡÷HΪ¡°+¡±ÎªÎüÈÈ·´Ó¦£®ÈÈ»¯Ñ§·½³ÌʽÖл¯Ñ§¼ÆÁ¿ÊýÖ»±íʾ¸ÃÎïÖʵÄÎïÖʵÄÁ¿£¬²»±íʾÎïÖÊ·Ö×Ó¸öÊý»òÔ×Ó¸öÊý£¬Ëü¿ÉÒÔÊÇÕûÊý£¬Ò²¿ÉÒÔÊÇ·ÖÊý£®
½â´ð£º½â£ºA£®ÈÈ»¯Ñ§·½³ÌʽÖС÷HΪ¡°-¡±Îª·ÅÈÈ·´Ó¦£¬¸ù¾ÝH2£¨g£©+
O2£¨g£©¨TH2O£¨g£©¡÷H=-241.8kJ/mol£»¿ÉÖª£º1molH2ȼÉÕÉú³É1molH2O£¨g£©Ê±£¬·Å³ö241.8kJµÄÈÈÁ¿£®¹ÊAÕýÈ·£®
B£®ÔÚ25¡æºÍ101kPaʱ£¬1 mol¿ÉȼÎïÍêȫȼÉÕÉú³ÉÎȶ¨µÄ»¯ºÏÎïʱËù·Å³öµÄÈÈÁ¿£¬½Ð×ö¸ÃÎïÖʵÄȼÉÕÈÈ£®¸ù¾Ý
H2£¨g£©+
O2£¨g£©¨TH2O£¨1£©¡÷H=-285.8kJ/mol£®¿ÉÖª£º1molH2ȼÉÕÉú³ÉÎȶ¨µÄ1molH2O£¨1£©·Å³ö285.8kJµÄÈÈÁ¿£®µ«È¼ÉÕÈȵĵ¥Î»ÎªkJ/mol£®¹ÊB´íÎó£®
C£®ÈÈ»¯Ñ§·½³ÌʽÖл¯Ñ§¼ÆÁ¿ÊýÖ»±íʾ¸ÃÎïÖʵÄÎïÖʵÄÁ¿£¬¹ÊO2Ç°ÃæµÄ12±íʾ²Î¼Ó·´Ó¦µÄO2µÄÎïÖʵÄÁ¿Ëµ·¨ÕýÈ·£®¹ÊCÕýÈ·£®
D£®¸ù¾ÝH2£¨g£©+
O2£¨g£©¨TH2O£¨g£©¡÷H=-241.8kJ/mol£»¢Ù
H2£¨g£©+
O2£¨g£©¨TH2O£¨1£©¡÷H=-285.8kJ/mol¢Ú
ÓÉ¢Ù-¢ÚµÃ£ºH2O£¨1£©=H2O£¨g£©£»¡÷H=44kJ 1molҺ̬ˮ±ä³ÉË®ÕôÆøʱÎüÊÕ44kJµÄÈÈÁ¿
¹ÊDÕýÈ·£®
¹ÊÑ¡B£®
1 |
2 |
B£®ÔÚ25¡æºÍ101kPaʱ£¬1 mol¿ÉȼÎïÍêȫȼÉÕÉú³ÉÎȶ¨µÄ»¯ºÏÎïʱËù·Å³öµÄÈÈÁ¿£¬½Ð×ö¸ÃÎïÖʵÄȼÉÕÈÈ£®¸ù¾Ý
H2£¨g£©+
1 |
2 |
C£®ÈÈ»¯Ñ§·½³ÌʽÖл¯Ñ§¼ÆÁ¿ÊýÖ»±íʾ¸ÃÎïÖʵÄÎïÖʵÄÁ¿£¬¹ÊO2Ç°ÃæµÄ12±íʾ²Î¼Ó·´Ó¦µÄO2µÄÎïÖʵÄÁ¿Ëµ·¨ÕýÈ·£®¹ÊCÕýÈ·£®
D£®¸ù¾ÝH2£¨g£©+
1 |
2 |
H2£¨g£©+
1 |
2 |
ÓÉ¢Ù-¢ÚµÃ£ºH2O£¨1£©=H2O£¨g£©£»¡÷H=44kJ 1molҺ̬ˮ±ä³ÉË®ÕôÆøʱÎüÊÕ44kJµÄÈÈÁ¿
¹ÊDÕýÈ·£®
¹ÊÑ¡B£®
µãÆÀ£ºÕÆÎÕÈÈ»¯Ñ§·½³ÌʽµÄÒâÒ壬ÕÆÎÕȼÉÕÈȵĶ¨Ò壬עÒⵥλµÄʹÓã¬Êǽâ´ð±¾ÌâµÄ¹Ø¼ü£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿