摘要:已知在1×105 Pa.298 K条件下.2 mol氢气燃烧生成水蒸气放出484 kJ热量, 下列热化学方程式正确的是 A. H2O(g) == H2(g)+1/2 O2(g), △H1=+242 kJ·mol-1 B. 2 H2(g)+ O2(g)===2 H2O(l), △H2=- 484 kJ·mol-1 C. H2(g)+1/2 O2(g)====H2O(g) , △H1=+242 kJ·mol-1 D. 2 H2(g)+ O2(g)===2 H2O(g), △H2=+484 kJ·mol-1
网址:http://m.1010jiajiao.com/timu3_id_39698[举报]
已知在1×105 Pa,298 K条件下,2 mol氢气燃烧生成水蒸气放出484 kJ热量,下列热化学方程式正确的是
A.H2O(g)====H2(g)+1/2 O2(g) ;ΔH=+242 kJ·mol-1
B.2H2(g)+O2(g)====2H2O(l) ;ΔH=-484 kJ·mol-1
C.H2(g)+1/2 O2(g)====H2O(g);ΔH=+242 kJ·mol-1
D.2H2(g)+O2(g)====2H2O(g) ;ΔH=+484 kJ·mol-1
查看习题详情和答案>>
已知在1×105 Pa,298 K条件下,2 mol氢气燃烧生成水蒸气放出484 kJ热量,下列热化学方程式正确的是( )
A.H2O(g)H2(g)+1/2O2(g) ΔH=+242 kJ·mol-1
B.2H2(g)+O2(g)2H2O(l) ΔH=-484 kJ·mol-1
C.H2(g)+1/2O2(g)H2O(g) ΔH=+242 kJ·mol-1
D.2H2(g)+O2(g)2H2O(g) ΔH=+484 kJ·mol-1
查看习题详情和答案>>