第一節(jié)化學(xué)反應(yīng)與能量的變化：熱化學(xué)方程式練習(xí)題-文庫(kù)吧
2025-05-31 21:05 本頁(yè)面
【正文】 2O(l) ΔH＝－ kJmol－1B．CH4(g)＋2O2(g)===CO2(g)＋2H2O(l) ΔH＝－ kJmol－1C．CH4(g)＋2O2(g)===CO2(g)＋2H2O(g) ΔH＝－ kJmol－1D．CH4(g)＋2O2(g)===CO2(g)＋2H2O(l) ΔH＝＋ kJmol－17．已知充分燃燒a g乙炔氣體時(shí)生成1 mol二氧化碳?xì)怏w和液態(tài)水，并放出熱量b kJ，則乙炔燃燒的熱化學(xué)方程式正確的是( )A．2C2H2(g)＋5O2(g)===4CO2(g)＋2H2O(l) ΔH＝－4b kJ/molB．C2H2(g)＋O2(g)===2CO2(g)＋H2O(l) ΔH＝2b kJ/molC．2C2H2(g)＋5O2(g)===4CO2(g)＋2H2O(l) ΔH＝－2b kJ/molD．2C2H2(g)＋5O2(g)===4CO2(g)＋2H2O(l) ΔH＝b kJ/mol8．已知：(1)H2(g)＋O2(g)===H2O(g) ΔH1＝a kJmol－1(2)2H2(g)＋O2(g)===2H2O(g) ΔH2＝b kJmol－1(3)H2(g)＋O2(g)===H2O(l) ΔH3＝c kJmol－1(4)2H2(g)＋O2(g)===2H2O(l) ΔH4＝d kJmol－1下列關(guān)系式中正確的是( )A．a(chǎn)c0 B．2a＝b0 C．bd0 D．2c＝d09．有如下三個(gè)熱化學(xué)方程式：(1)H2(g)＋O2(g)===H2O(g)ΔH1＝a kJmol－1(2)H2(g)＋O2(g)===H2O(l)ΔH2＝b kJmol－1(3)2H2(g)＋O2(g)===2H2O(l)ΔH3＝c kJmol－1關(guān)于它們的下列描述正確的是( )A．它們都是吸熱反應(yīng) B．a(chǎn)、b和c均為正值 C．a(chǎn)b D．2b＝c10． mol的氣體高能燃料乙硼烷(B2H6)在O2中燃燒，生成固態(tài)B2O3和液態(tài)H2O， kJ的熱量。又知：H2O(l)===H2O(g)；ΔH＝＋44 kJ/mol。下列熱化學(xué)方程式正確的是( )A．B2H6(g)＋3O2(g)===B2O3(s)＋3H2O(g) ΔH＝－2165 kJmol－1B．B2H6(g)＋3O2(g)===B2O3(s)＋3H2O(g) ΔH＝－2033 kJmol－1C．B2H6(g)＋3O2(g)===B2O3＋3H2O ΔH＝－2165 kJmol－1D．B2H6(g)＋O2(g)===B2O3(s)＋H2O(l) ΔH＝－2165 kJmol－111．化學(xué)反應(yīng)N2＋3H2===2NH3的能量變化如下圖所示，該反應(yīng)的熱化學(xué)方程式是( )A．N2(g)＋3H2(g)===2NH3(
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