已知热化学方程式: H2O(g)=H2(g) +1/2O2(g)△H = +24
题型:选择题
问题:
已知热化学方程式: H2O(g)=H2(g) +1/2O2(g) △H = +241.8kJ/mol
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44kJ
B.吸热2.44KJ
C.放热44kJ
D.放热2.44KJ
已知热化学方程式: H2O(g)=H2(g) +1/2O2(g) △H = +241.8kJ/mol
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44kJ
B.吸热2.44KJ
C.放热44kJ
D.放热2.44KJ