Logo

AskSia

Plus

根据下列实验及规象,能量关系正确的是() A. 钠投入水中,熔化成小球:生成物的总能量高于反应物总能量 B. NaOH\mathrm{NaOH} 溶液与 $\m...
Mar 19, 2024
根据下列实验及规象,能量关系正确的是() A. 钠投入水中,熔化成小球:生成物的总能量高于反应物总能量 B. NaOH\mathrm{NaOH} 溶液与 HCl\mathrm{HCl} 溶液混合,溶液温度升高:反应放热 C. 将“ NO2\mathrm{NO}_{2} 球”置于热水中,红棕色加深: \mathrm{N}_{2} \mathrm{O}_{4}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_{2}(\mathrm{~g}) ; \Delta H<0 D. 微热含 2 滴酚唒的 Na2CO3\mathrm{Na}_{2} \mathrm{CO}_{3} 溶液,红色加深: \mathrm{CO}_{3}^{2-}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{HCO}_{3}^{-}+\mathrm{OH}^{-} ; \Delta H<0
B
Key Concept
Exothermic Reaction
Explanation
When an NaOH\mathrm{NaOH} solution is mixed with an HCl\mathrm{HCl} solution, the reaction is exothermic, meaning it releases heat, which causes the temperature of the solution to rise.
© 2023 AskSia.AI all rights reserved