(5)C6H6(1)+15/2O2(g)=6CO2(g)+3H2O(1) △H=-3260.4kJ/mol 查看更多

 

题目列表(包括答案和解析)

已知下列热化学方程式:

(1)CH3COOH(l)+2O2(g) === 2CO2(g)+2H2O(l)    △H1= -870.3kJ·mol-1

(2)C(s)+O2(g) === CO2(g)                     △H2= -393.5 kJ·mol-1

(3)H2(g)+O2(g) ===  H2O(l)                   H3= -285.8 kJ·mol-1

则反应2C(s)+2H2(g)+O2(g)===CH3COOH(l) 的焓变△H为(    )kJ·mol-1

A.488.3       B.-244.15         C.244.15        D.-488.3

 

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已知下列热化学方程式:

(1)CH3COOH(l)+2O2(g) === 2CO2(g)+2H2O(l)     △H1= -870.3 kJ·mol-1

(2)C(s)+O2(g) === CO2(g)                      △H2= -393.5 kJ·mol-1

(3)H2(g)+O2(g) ===  H2O(l)                    H3= -285.8 kJ·mol-1

则反应2C(s)+2H2(g)+O2(g)===CH3COOH(l) 的△H为(     )kJ·mol-1

A.+488.3        B.-244.15         C.-488.3        D. +244.15

 

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.已知下列热化学方程式:

(1)CH3COOH(l)+2O2(g) === 2CO2(g)+2H2O(l)     △H1= -870.3 kJ·mol-1

(2)C(s)+O2(g) === CO2(g)                      △H2= -393.5 kJ·mol-1

(3)H2(g)+O2(g) ===  H2O(l)                    △H3= -285.8 kJ·mol-1

则反应2C(s)+2H2(g)+O2(g)===CH3COOH(l) 的焓变△H为(     )kJ·mol-1

A.488.3        B.-244.15         C.244.15        D.-488.3

 

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已知下列热化学方程式:

(1)CH3COOH(l)+2O2(g) === 2CO2(g)+2H2O(l)     △H1= -870.3 kJ·mol-1

(2)C(s)+O2(g) === CO2(g)                      △H2= -393.5 kJ·mol-1

(3)H2(g)+O2(g) ===  H2O(l)                    H3= -285.8 kJ·mol-1

则反应2C(s)+2H2(g)+O2(g)===CH3COOH(l) 的焓变△H为(     )kJ·mol-1

A.488.3        B.-244.15         C.244.15        D.-488.3

查看答案和解析>>

已知下列热化学方程式:

(1)CH3COOH(l)+2O2(g) === 2CO2(g)+2H2O(l)     △H1= -870.3 kJ·mol-1

(2)C(s)+O2(g) === CO2(g)                      △H2= -393.5 kJ·mol-1

(3)H2(g)+O2(g) ===  H2O(l)                    H3= -285.8 kJ·mol-1

则反应2C(s)+2H2(g)+O2(g)===CH3COOH(l) 的焓变△H为(     )kJ·mol-1

A.488.3        B.-244.15         C.244.15        D.-488.3

 

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