For each reaction, predict the sign and find the value of(c) P₄(s) + 5O₂(g) → P₄O₁₀(s)

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23-08-2022
Chemistry

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For each reaction, predict the sign and find the value of(c) P₄(s) + 5O₂(g) → P₄O₁₀(s)

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tripatsingh039 tripatsingh039 · Answer 1 · 2022-08-27T13:07:28+02:00

When a chemical reacts with oxygen, a significant amount of energy is released in the form of heat and light. Oxygen reacts with reactive elements.

P4(s) + 5O2(g) = P4O10 (s) (This is a synthesis reaction as well.)

To get to the final response, we should change the first two reactions given:

The first reaction should be reversed, and as a result, its H should be multiplied by (-1): P4O6(s) P4(s) + 3O2(g), H1' = 1640.1 kJ.

In order to reverse the second reaction, multiply its H by (-1): P4(s) + 5O2(g) P4O10(s), H2' = - 2940.

1 kJ.

P4O6(s) P4O10 is the result of adding the two reactions after modification (s).

H = H1 + H2 = 1640.1 + (- 2940.1 kJ) = - 1300 kJ.

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