The reaction of ammonia with oxygen can be catalyesd by red-hot platinum .Which of the following statement concerning the reaction is /are corrrecr?
(1)The reation gives nitrogen monxide and water as the major products
(2)tHE REaction gives nitrogen dioxide and water as the majior produchts
(3)the reation is exothermic
Answer:(1) and(3) are correct
Why (2) is wrong?
What exactly happened int the reaction of ammonia with onxygen ?
CE chem
2009-04-08 5:16 am
回答 (2)
2009-04-08 6:16 am
✔ 最佳答案
(1) is correct.
In the presence of red-hot platinum as catalyst, ammonia reacts with oxygen to give nitrogen monoxide and water.
4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)
(2) is incorrect.
The major products of the reaction are nitrogen monoxide and water. At room temperature, nitrogen monoxide reacts with oxygen in air to give nitrogen dioxide.
2NO(g) + O2(g) → 2NO2(g)
However, nitrogen dioxide is NOT the product of the reaction between ammonia and oxygen in the presence of red-hot platinum catalyst.
(3) is correct.
The reaction is very exothermic. The heat evolved from the reaction makes the platinum catalyst keep red hot without heating.
=
2009-04-08 6:54 am
1. 4NH3 + 5O2 ----- 6H2O + 4NO
major products就係 nitrogen monxide and water
2. 上面formula寫左,major products就係
nitrogen monxide and water,而唔係nitrogen dioxide
and then nitrogen monxide oxidized to nitrogen dioxide
3. it is a Redox reaction,which is exothermic
仲有,呢個Reaction已經Out Sy
而家會考一定唔會出
major products就係 nitrogen monxide and water
2. 上面formula寫左,major products就係
nitrogen monxide and water,而唔係nitrogen dioxide
and then nitrogen monxide oxidized to nitrogen dioxide
3. it is a Redox reaction,which is exothermic
仲有,呢個Reaction已經Out Sy
而家會考一定唔會出
參考: 我係應屆會考生
收錄日期: 2021-04-30 11:56:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090407000051KK01748