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ÒÑÖª:¢ÙH2O(g)=H2O(l) ¦¤H1=-Q1 kJ/mol
¢ÚC2H5OH(g)=C2H5OH(l) ¦¤H2=-Q2 kJ/mol
¢ÛC2H5OH(g)+3O2(g)=2CO2(g)+3H2O(g)¦¤H3=-Q3 kJ/mol
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ÒÑÖª:¢ÙH2O(g)=H2O(l) ¦¤H1=-Q1 kJ/mol
¢ÚC2H5OH(g)=C2H5OH(l) ¦¤H2=-Q2 kJ/mol
¢ÛC2H5OH(g)+3O2(g)=2CO2(g)+3H2O(g)¦¤H3=-Q3 kJ/mol
Èôʹ23 gҺ̬ÎÞË®¾Æ¾«ÍêȫȼÉÕ,×îºó»Ö¸´µ½ÊÒÎÂ,Ôò·Å³öµÄÈÈÁ¿Îª(µ¥Î»:kJ)£¨ £©
A£®Q1+Q2+Q3 | B£®1.5Q1-0.5Q2+0.5Q3 |
C£®0.5Q1-1.5Q2+0.5Q3 | D£®0.5(Q1+Q2+Q3) |
B
¸ù¾Ý¸Ç˹¶¨ÂÉ¢Ù¡Á3-¢Ú+¢ÛµÃ,C2H5OH(l)+3O2(g)=3H2O(l)+2CO2(g) ¦¤H=(-3Q1+Q2-Q3)kJ/mol=-(3Q1-Q2+Q3)kJ/mol,23 gҺ̬ÎÞË®¾Æ¾«¼´0.5 molÍêȫȼÉշųöµÄÈÈÁ¿Îª(3Q1-Q2+Q3)¡Á0.5 kJ=(1.5Q1-0.5Q2+0.5Q3)kJ,¹ÊBÕýÈ·¡£
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