The following reaction represents the decomposition of ammonia: 2NH3(9) N₂(g) + 3H₂(g) Under standard conditions the activation energy is 335 kJ/mol. The effects of using two different catalysts on the above reaction were tested and the following results were obtained: Catalyst Ea (kJ/mol) Tungsten 163 Osmium 197 The better catalyst would be because the activation energy

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The following reaction represents the decomposition of ammonia:
2NH3(9) N₂(g) + 3H₂(g)
Under standard conditions the activation energy is 335 kJ/mol. The effects of using two different catalysts on the above reaction were tested and the following results were obtained:
Catalyst Ea (kJ/mol)
Tungsten 163
Osmium 197
The better catalyst would be
because
the activation energy
Transcribed Image Text:The following reaction represents the decomposition of ammonia: 2NH3(9) N₂(g) + 3H₂(g) Under standard conditions the activation energy is 335 kJ/mol. The effects of using two different catalysts on the above reaction were tested and the following results were obtained: Catalyst Ea (kJ/mol) Tungsten 163 Osmium 197 The better catalyst would be because the activation energy
Hydrogen peroxide can be decomposed according to the following equation:
2H₂O2(1)→ 2H₂O(l) + O2(9)
A student performed four trials to test the result of how much oxygen was produced by changing variables. In each trial, the amount of hydrogen peroxide decomposed was a controlled variable. The students results are displayed in the following graph:
70
Trial 1 Trial 2
60
50
Volume
=V
0₂ 40
(mL.) 30
20
10
1.0 2.0 3.0 4.0 5.0
Time (min)
Which trial, most likely, incorporated the use of a catalyst?
Select one:
O Trial 11
O Trial 2
O Trial 3
O Trial 4
Trial 3
Consider the following reaction mechanism for the depletion of ozone:
Step 1 NO(g) + 03(g) → NO₂(g) + O₂(g)
Step 2 NO₂(g) + 0(g) → NO(g) + O₂(9)
Which of the following substances would most likely be classified as the catalyst in the above reaction mechanism?
Select one:
O NO(g)
○ O₂(9)
O 0(g)
O NO₂(9)
Transcribed Image Text:Hydrogen peroxide can be decomposed according to the following equation: 2H₂O2(1)→ 2H₂O(l) + O2(9) A student performed four trials to test the result of how much oxygen was produced by changing variables. In each trial, the amount of hydrogen peroxide decomposed was a controlled variable. The students results are displayed in the following graph: 70 Trial 1 Trial 2 60 50 Volume =V 0₂ 40 (mL.) 30 20 10 1.0 2.0 3.0 4.0 5.0 Time (min) Which trial, most likely, incorporated the use of a catalyst? Select one: O Trial 11 O Trial 2 O Trial 3 O Trial 4 Trial 3 Consider the following reaction mechanism for the depletion of ozone: Step 1 NO(g) + 03(g) → NO₂(g) + O₂(g) Step 2 NO₂(g) + 0(g) → NO(g) + O₂(9) Which of the following substances would most likely be classified as the catalyst in the above reaction mechanism? Select one: O NO(g) ○ O₂(9) O 0(g) O NO₂(9)
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