燃燒熱的測(cè)定_苯甲酸_萘(實(shí)驗(yàn)處理)

1、苯甲酸萘1次/30秒1次/30秒時(shí)間溫度時(shí)間溫度時(shí)間溫度時(shí)間溫度124.652627.19124.662627.19224.702727.19224.712727.19324.712827.19324.722827.19424.722927.20424.722927.20524.733027.20524.733027.20624.743127.20624.743127.20724.753227.20724.743227.20824.763327.20824.753327.20924.763427.20924.753427.201024.763527.201024.753527.201124.8

2、03627.201124.783627.201224.893727.191225.133727.191325.003827.191325.803827.191425.153927.191426.183927.191525.354027.191526.594027.191625.504127.191626.784127.191725.614227.181726.894227.181825.704327.181826.984327.181925.754427.181927.044427.182025.784527.182027.084527.182125.794627.172127.114627.

3、172225.794727.172227.134727.172325.804827.172327.154827.172427.174927.172427.174927.172527.185027.162527.185027.16類似處理方法 計(jì)算卡計(jì)的熱容C，并求出兩次實(shí)驗(yàn)所得水當(dāng)量的平均值。苯甲酸的燃燒反應(yīng)方程式為：根據(jù)基爾霍夫定律：Cp，m 7×Cp，m（CO2,g）3×Cp，m（H2O,l）Cp，m（苯甲酸,s）Cp，m（O2,g）154.6805 J/molK 當(dāng)室溫為26.0 時(shí)苯甲酸的燃燒焓為：cHm（26.0）cHm（25.0）+Cp×T -3226

4、.9154.6805×(26.0-25.0)×10-3 -3225.84 kJ/mol則：苯甲酸的恒容摩爾燃燒熱為：QV cUmcHm RTBVB(g) -3225.848.314×299.15×(77.5) ×10-3 -3224.6 kJ/mol又：nQV-CT -QV點(diǎn)火線·m點(diǎn)火線（）苯甲酸燃燒的數(shù)據(jù)處理：QV點(diǎn)火絲·m點(diǎn)火絲 -6694.4×10-3×3.7×10-3 -0.02477 kJ15.517 kJ/（）苯甲酸燃燒的數(shù)據(jù)處理：QV點(diǎn)火絲·m點(diǎn)火絲 -6694.4&#

5、215;10-3×9×10-4 -6.025×10-3 kJ15.866 kJ/（）兩次實(shí)驗(yàn)所得水當(dāng)量的平均值為：=(15.51715.866）÷215.692 kJ/計(jì)算萘的恒容摩爾燃燒熱QV，m根據(jù)公式：nQV-CT -QV點(diǎn)火線·m點(diǎn)火線則：（）萘燃燒的數(shù)據(jù)處理：QV點(diǎn)火絲·m點(diǎn)火絲 -6694.4×10-3×5.4×10-3 -0.03615 kJQV，m（-CT -QV點(diǎn)火線·m點(diǎn)火線）/n5217.9 kJ/mol（）萘燃燒的數(shù)據(jù)處理：QV點(diǎn)火絲·m點(diǎn)火絲 -6694.4&

6、#215;10-3×1.7×10-3 -0.01138 kJQV，m（-CT -QV點(diǎn)火線·m點(diǎn)火線）/n5178 kJ/mol（）萘的恒容摩爾燃燒熱平均值為(5217.95178) ÷25197.5 kJ/mol求萘的恒壓摩爾燃燒熱Qp，m（即cHm）萘燃燒的化學(xué)方程式為： ，根據(jù)基爾霍夫定律：Cp，m 10×Cp，m（CO2,g）4×Cp，m（H2O,l）Cp，m（萘,s）12Cp，m（O2,g）154.304 J/molK26.0 時(shí)萘的燃燒焓為：cHm （26.0）cUm RTBVB(g) 5206.638.314×299.15×（2）×10-3 5211.604 kJ/mol由基爾霍夫定律將cHm （T）換成cHm （298.15K），并與文獻(xiàn)比較