Predict whether the following reactions will be exothermic or endothermic.
A. N₂(g) + 3H₂(g) -----> 2NH₃
B. S(g) + O₂(g) --------> SO₂(g)
C. 2H₂O(g) --------> 2H₂(g) + O₂(g)
D. 2F(g) ---------> F₂(g)

Question

03-12-2019
Chemistry

contestada

Predict whether the following reactions will be exothermic or endothermic.
A. N₂(g) + 3H₂(g) -----> 2NH₃
B. S(g) + O₂(g) --------> SO₂(g)
C. 2H₂O(g) --------> 2H₂(g) + O₂(g)
D. 2F(g) ---------> F₂(g)

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mnhlabatsi7 mnhlabatsi7 · Answer 1 · 2019-12-04T20:23:17+01:00

Answer:

A. N₂(g) + 3H₂(g) -----> 2NH₃ exothermic

B. S(g) + O₂(g) --------> SO₂(g) exothermic

C. 2H₂O(g) --------> 2H₂(g) + O₂(g) endothermic

D. 2F(g) ---------> F₂(g) exothermic

Explanation:

The question says predict not calculate. So you have to use your chemistry knowledge, experience and intuition.

A. N₂(g) + 3H₂(g) -----> 2NH₃ is exothermic because the Haber process gives out energy

B. S(g) + O₂(g) --------> SO₂(g) is exothermic because it is a combustion. The majority, if not all, combustion give out energy.

C. 2H₂O(g) --------> 2H₂(g) + O₂(g) is endothermic because it is the reverse reaction of the combustion of hydrogen. If the reverse reaction is exothermic then the forward reaction is endothermic

D. 2F(g) ---------> F₂(g) is exothermic because the backward reaction is endothermic. Atomisation is always an endothermic reaction so the forward reaction is exothermic

Predict whether the following reactions will be exothermic or endothermic. A. N₂(g) + 3H₂(g) -----> 2NH₃ B. S(g) + O₂(g) --------> SO₂(g) C. 2H₂O(g) --------> 2H₂(g) + O₂(g) D. 2F(g) ---------> F₂(g)

Respuesta :

Otras preguntas

Predict whether the following reactions will be exothermic or endothermic.
A. N₂(g) + 3H₂(g) -----> 2NH₃
B. S(g) + O₂(g) --------> SO₂(g)
C. 2H₂O(g) --------> 2H₂(g) + O₂(g)
D. 2F(g) ---------> F₂(g)