A、∆H<sub>3sub>=∆H<sub>1sub>+∆H<sub>2sub> B、∆H<sub>3sub>=∆H<sub>1sub>-∆H<sub>2sub> C、∆H<sub>3sub>=∆H<sub>2sub>-∆H<sub>1sub> D、∆H<sub>3sub>=2∆H<sub>1sub>-∆H<sub>2sub>
A、∆H<sub>3sub>=∆H<sub>1sub>+∆H<sub>2sub> B、∆H<sub>3sub>=∆H<sub>1sub>-∆H<sub>2sub> C、∆H<sub>3sub>=∆H<sub>2sub>-∆H<sub>1sub> D、∆H<sub>3sub>=2∆H<sub>1sub>-∆H<sub>2sub>
A、CuO+H<sub>2sub>=Cu+H<sub>2sub>O,吸热反应 B、CuO+H<sub>2sub>=Cu+H<sub>2sub>O,放热反应 C、CuO+H<sub>2sub>=Cu+H<sub>2sub>O,可逆反应 D、ABC均不对
A、CS<sub>2sub>+H<sub>2sub>O→COS+H<sub>2sub>S B、CS<sub>2sub>+2H<sub>2sub>O→CO<sub>2sub>+2H<sub>2sub>S C、CS<sub>2sub>+H<sub>2sub>O→CO+H<sub>2sub>S D、2CS<sub>2sub>+H<sub>2sub>O→2COS+<sub>2sub>
A、与足量的NaOH溶液共热后,再通入足量CO<sub>2sub> B、与足量的NaOH溶液共热后,再加入适量H<sub>2sub>SO<sub>4sub> C、与稀H<sub>2sub>SO<sub>4sub>共热后,加入足量的NaOH溶液 D、与稀H<sub>2sub>SO<sub>4sub>共热后,加入足量的Na<sub>2sub>CO<sub>3sub>溶液
A、2NO<sub>2sub>⇆N<sub>2sub>O<sub>4sub>(正反应为放热反应) B、C(s)+CO<sub>2sub>⇆2CO(正反应为吸热反应) C、N<sub>2sub>+3H<sub>2sub>⇆2NH<sub>3sub>(正反应为放热反应) D、H<sub>2sub>S⇆H<sub>2sub>+S(s)(正反应为吸热反应)
A、C+O<sub>2sub>=CO<sub>2sub> B、C+H<sub>2sub>O=CO+H<sub>2sub> C、C+2H<sub>2sub>=CH<sub>4sub>
A、C+O<sub>2sub>=CO<sub>2sub> B、C+O<sub>2sub>=CO C、CO+H<sub>2sub>O=CO<sub>2sub>+H<sub>2sub> D、C+H<sub>2sub>O=CO+H<sub>2sub>
A、H<sub>2sub>S+1/2O<sub>2sub>=1/2S<sub>2sub>+H<sub>2sub>S B、CH<sub>4sub>+2O<sub>2sub>=CO<sub>2sub>+2H<sub>2sub>O C、2H<sub>2sub>S+3O<sub>2sub>=2SO<sub>2sub>+2H<sub>2sub>O D、COS+H<sub>2sub>O=CO<sub>2sub>+H<sub>2sub>S