Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

Nitric oxide reacts with hydrogen to form nitrous oxide, and water. Use the following data to determine the rate equation for the reaction 2NO + H₂ → N₂O + H₂O. Data: Expt 1: [NO]=0.021, [H₂]=0.065, Rate=1.46; Expt 2: [NO]=0.021, [H₂]=0.260, Rate=1.46; Expt 3: [NO]=0.042, [H₂]=0.065, Rate=5.84.
Options
A rate = k[NO]
B rate = k[NO]²
Correct Answer
C rate = k[NO][H₂]
D rate = k[NO]²[H₂]
Correct Answer

Option B is the correct answer.

Detailed Explanation

Comparing Expt 1 and 2: [NO] constant, [H₂] quadruples, rate unchanged → zero order in H₂. Comparing Expt 1 and 3: [H₂] constant, [NO] doubles, rate quadruples (1.46 to 5.84) → second order in NO. Rate = k[NO]².

Hint

Find how rate changes when each reactant's concentration is changed while the other is held constant.

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1016 of 1872
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