For the formation of 1 mol of nitrosyl chloride at a given temperature, ? H = 40
ID: 810487 • Letter: F
Question
For the formation of 1 mol of nitrosyl chloride at a given temperature, ?H = 40 kJ.
NO(g) + Cl2(g) ? NOCl(g)
The activation energy for this reaction is 84 kJ/mol. What is the activation energy for the reverse reaction?
40 kJ/mol
44 kJ/mol
84 kJ/mol
124 kJ/mol
124 kJ/mol
Rate = k1[N2O5]
Rate = k2[NO2][NO3]
Rate = k3[NO][N2O5]
Rate = k1k2[N2O5][NO2][NO3]
Rate = k1k2k3[N2O5]2
40 kJ/mol
44 kJ/mol
84 kJ/mol
124 kJ/mol
124 kJ/mol
A proposed mechanism for the decomposition of N2O5 is as follows:
N2O5 NO2 + NO3 slow step
NO2 + NO3 NO2 + O2 + NO fast step
NO + N2O5 3NO2 fast step
What is the rate law predicted by this mechanism?
Rate = k1[N2O5]
Rate = k2[NO2][NO3]
Rate = k3[NO][N2O5]
Rate = k1k2[N2O5][NO2][NO3]
Rate = k1k2k3[N2O5]2
For the formation of 1 mol of nitrosyl chloride at a given temperature, ?H = 40 kJ. NO(g) + Cl2(g) ? NOCl(g) The activation energy for this reaction is 84 kJ/mol. What is the activation energy for the reverse reaction? 40 kJ/mol 44 kJ/mol 84 kJ/mol 124 kJ/mol 124 kJ/mol A proposed mechanism for the decomposition of N2O5 is as follows: step What is the rate law predicted by this mechanism?Explanation / Answer
1)?H = activation energy of forward reaction - activation energy of backward reaction
or, -40 = 84 - activation energy of backward reaction
or, -activation energy of backward reaction = 124 kJ/mole
2) Rate = k1[N2O5]
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