已知热化学方程式: (1) H2O(g)=H2(g) + 1/2O2(g)△H
题型:选择题
问题:
已知热化学方程式:
(1) H2O(g)=H2(g) + 1/2O2(g) △H = +241.8kJ/mol
(2) H2(g)+ 1/2O2(g) = H2O(1) △H = -285.8kJ/mol
当1g液态水变为水蒸气时,其热量变化是( )
A.吸热88kJ
B.吸热2.44KJ
C.放热44kJ
D.吸热44KJ
已知热化学方程式:
(1) H2O(g)=H2(g) + 1/2O2(g) △H = +241.8kJ/mol
(2) H2(g)+ 1/2O2(g) = H2O(1) △H = -285.8kJ/mol
当1g液态水变为水蒸气时,其热量变化是( )
A.吸热88kJ
B.吸热2.44KJ
C.放热44kJ
D.吸热44KJ