Loading....
Coupon Accepted Successfully!

General Chemistry

Open Flashcards

Equilibrium and Kinetics

Question
11 out of 13
 

At this point of advancements in science, chemists have a good understanding of the kinetics of reactions. They can predict the effects of changes in pH, temperature, and concentration in chemical reactions.

In a cylinder, there is a reaction mixture of hydrogen and iodine. The hydrogen and the iodine react to form hydrogen iodide.

image\27420 ch 11 passage 1.png

The industrial production of ammonia is done by a process called Haber process. The reaction occurs as shown below, and is usually done in the presence of an iron catalyst.

image\27430 ch 11 passage 1.png

ΔH = –92kJ


If 70 g of nitrogen is reacted with hydrogen, how many grams of ammonia will be produced ? (The weight of hydrogen used = 10 g)

A 42.5 g
B 57 g
C 85 g
D 17 g
Ans. B There are 2.5 moles (70 g) of nitrogen. The amount of H2 used should also be taken into account. According to the question, 10 g of hydrogen was used, which is equivalent to 5 moles. So the hydrogen acts as the limiting reagent. By the reaction of 5 moles of hydrogen with excess of nitrogen, the number of moles of ammonia produced should equal 10/3 moles. Now, it is a matter of converting moles to grams.

Equilibrium and Kinetics Flashcard List

13 flashcards
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)