Calculate δs°for the combustion of ammonia.
4nh3(g) + 3o2(g) → 2n2(g) + 6h2o(l)
substance nh3(g) o2(g) n2(g) h2o(l)
s°(j/k·mol) 192 205.1 192 70
-135 j
-579 j
-387 j
579 j

The of the reaction is

Explanation:

Entropy change of the reaction is defined as the difference between the total entropy change of the products and the total entropy change of the reactants.

The equation representing entropy change of the reaction follows:

For the given chemical equation:

We are given:

Putting values in above equation, we get:

Hence, the of the reaction is

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.