Single Choice

The percentage of ammonia obtainable, if equilibrium were to be established during the Haber process, is plotted against the operating pressure for two temperatures $$400^{\circ}C$$ and $$500^{\circ}C$$. Which of the following correctly represents the two graph ?

A
Correct Answer
B
C
D

Solution

Haber's process is
$$N_2(g) +3H_2(g) \rightarrow 2NH_3(g) $$.
$$\Delta H = -92.4 KJ.mol^{-1}$$. Hence, it is an exothermic reaction.
So, on increasing the temperature, there is excess heat present in the reaction. This heat can be absorbed in an endothermic reaction, which is the backward reaction of Haber's process. So, increasing the temperature lowers the percentage of ammonia. So, A and C are the possible option.
Also, as pressure increases, the reaction constant decreases. This is because n=2-(1+3) is less than 0. So, the reaction will move in forward reaction to reach equilibrium. This can also be explained by the fact that increasing pressure results in more molecules and hence more moles. So, the reaction will move such so as to reduce the number of moles. That is forward reaction. Hence, more ammonia is formed. Hence A is the correct option.

SIMILAR QUESTIONS

If $$R=\left\{\left(x,y\right):y=2x\right\}$$ is a relation in $$A=\left\{1,2,3,4,6,7,8\right\}$$ then write all the elements of $$R$$

Let $$X=\left\{1,2,3,4\right\}$$.Determine whether $$f=\left\{\left(1,1\right),\left(2,3\right),\left(3,4\right),\left(4,1\right)\right\}$$ are functions from $$X$$ to $$X$$

Let the universal set U, be a set all students of your school, A is set of boys. B is the set of girls C is the set of students participating in sports. Describe the following set in words and represent them by the Venn diagram. $$B \cap C$$

If $$A = $${1,4,6}, $$B = $${3,6}, then find $$(A \cap B)$$

Find the number of whole numbers in the solution set of following $$x - 5 <-2$$

Find the solution of the following: If $$5x + 4 > 8x - 11$$, then $$x

Say true or false. The A.M. between $$(a-b)^2$$ and $$(a+b)^2$$ is $$a^2+b^2 $$.

Given a line I and a point P on it. How many lines can be drawn passing through the point P?

If lines $$l_1\, \perp\, l_2$$ and the the slope of $$l_1$$ is $$\dfrac{1}{2}$$, then the the slope of $$l_2$$ is .......... .

Contact Details