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1、燃烧热计算公式已知：Qv苯甲酸=26581 J/g，Q点火丝=1400 J/g， M苯甲酸=122.12g/mol, M萘=128.11g/mol m苯甲酸Qv苯甲酸m点火丝Q点火丝=（m水C水+C计）T苯甲酸m苯甲酸Qv苯甲酸m点火丝Q点火丝= C总T苯甲酸苯甲酸0.9945g萘1.1213g点火丝0.004g点火丝0.0048gT苯甲酸2.033KT萘3.56K（3）计算 通过标准样品苯甲酸的数据求总的热容C总（J/K）m苯甲酸Qv苯甲酸m点火丝Q点火丝 = C总T苯甲酸0.9945g (26581J/g) 0.004g (1400J/g) = C总2.033KC总=11480.85J/K
2、通过总的热容C总（J/K）求萘的恒容燃烧热Qv萘m萘Qv萘m点火丝Q点火丝 = C总T萘1.1213g Qv萘 0.0048g (1400J/g) = 11480.85J/K 3.56K1.1213g Qv萘6.72J = 40871.83JQv萘 = = 36444.40J/gJ/g g/mol = J/mol= 36444.40J/g 128.11g/mol= 4668.89 KJ/mol 求萘的恒压燃烧热 Dn= -2QP = QV + DnRT= -4668.89 KJ/mol + (-2)8.314J/mol/K298K/1000= -4673.85kJmol-1误差估算（4）另一种
3、计算方式。所有燃烧热的值都取正值！ 通过标准样品苯甲酸的数据求总的热容C总（J/K）m苯甲酸Qv苯甲酸 m点火丝Q点火丝 = C总T苯甲酸0.9945g 26581J/g 0.004g 1400J/g = C总2.033KC总=11480.85J/K通过总的热容C总（J/K）求萘的恒容燃烧热Qv萘m萘Qv萘 m点火丝Q点火丝 = C总T萘1.1213g Qv萘 0.0048g 1400J/g = 11480.85J/K 3.56K1.1213g Qv萘6.72J = 40871.83JQv萘 = = 36444.40J/gJ/g g/mol = J/mol= 36444.40J/g 128.11g/mol= 4668.89 KJ/mol 求萘的恒压燃烧热 Dn= -2QP = QV + DnRT= 4668.89 KJ/mol + 28.314 J/mol/K 298K/1000= 4673.85kJmol-1误差估算
