已知2H2(g)+O2(g)===2H2O(l),ΔH=-569.6 kJ·mol-1.2H2O(g)===2H2(g)+O2(g),ΔH=+482.1 kJ·mol-1.现有1 g液态H2O.蒸发时吸收的热量是( ) A.2.43 kJ B.4.86 kJC.43.8 kJ D.87.5 kJ 查看更多

 

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已知2H2(g)+O2(g)2H2O(l);ΔH=-569.6 kJ·mol-1,2H2O(g)2H2(g)+O2(g);ΔH=+482.1 kJ·mol-1.现有1 g液态H2O,蒸发时吸收的热量是

A.

2.43 kJ

B.

4.86 kJ

C.

43.8 kJ

D.

87.5 kJ

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 已知2H2(g)+O2(g)===2H2O(l);ΔH=-569.6 kJ·mol-1,2H2O(g)===2H2(g)+O2(g);ΔH=+482.1kJ·mol-1。现有1 g液态H2O,蒸发时吸收的热量是

A.2.43kJ      B.4.86kJ    C.43.8kJ       D.87.5 kJ

查看答案和解析>>

 已知2H2(g)+O2(g)===2H2O(l);ΔH=-569.6 kJ·mol-1,2H2O(g)===2H2(g)+O2(g);ΔH=+482.1kJ·mol-1。现有1 g液态H2O,蒸发时吸收的热量是

A.2.43kJ      B.4.86kJ    C.43.8kJ       D.87.5 kJ

查看答案和解析>>

已知2H2(g)+O2(g)===2H2O(l);ΔH=-569.6 kJ·mol1,2H2O(g)===2H2(g)+O2(g);ΔH=+482.1kJ·mol1。现有1 g液态H2O,蒸发时吸收的热量是

A.2.43kJB.4.86kJC.43.8kJ D.87.5 kJ

查看答案和解析>>

已知2H2(g)+O2(g)===2H2O(l);ΔH=-569.6 kJ·mol1,2H2O(g)===2H2(g)+O2(g);ΔH=+482.1kJ·mol1。现有1 g液态H2O,蒸发时吸收的热量是
A.2.43kJB.4.86kJC.43.8kJ D.87.5 kJ

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