Calculate the activation energy for the reverse reaction

Click For Summary
SUMMARY

The activation energy for the reverse reaction of the decomposition of nitrosyl chloride (NOCl) is calculated using the given enthalpy change (Delta H) and the activation energy of the forward reaction. With Delta H = 38 kJ and the activation energy for the forward reaction at 100 kJ, the activation energy for the reverse reaction is determined to be 62 kJ. This is derived from the equation: Activation Energy (reverse) = Activation Energy (forward) - Delta H.

PREREQUISITES
  • Understanding of chemical thermodynamics
  • Familiarity with activation energy concepts
  • Knowledge of enthalpy changes in reactions
  • Basic skills in energy diagrams for chemical reactions
NEXT STEPS
  • Study the relationship between activation energy and enthalpy changes in chemical reactions
  • Learn how to construct and interpret energy diagrams for reactions
  • Explore the concept of transition states in chemical kinetics
  • Investigate the effects of temperature on reaction rates and activation energy
USEFUL FOR

Chemistry students, chemical engineers, and researchers in thermodynamics or reaction kinetics will benefit from this discussion.

ChelseaQ
Messages
1
Reaction score
0
For the decomposition of one mole of nitrosyl chloride, Delta H = 38kJ. NOCl(g)-->NO(g)+Cl2(g). The activation energy of this reaction is 100kJ. Calculate the activation energy for the reverse reaction in kJ.


I attempted this question but cannot find the process or equation to finish the question. So far I have only been able to calculate the Delta H of the product and reaction.
(NO + Cl2) - (NOCl) = (90.29 + 0) - (211.59)

I cannot figure out where to go from here and do not even know if I am starting off right..HELP PLEASE!
 
Physics news on Phys.org
Perhaps it would be helpful to draw a picture of the energies of the reactants, transition state, and products, then label the relevant energy values.
 

Similar threads

Chemistry Calculation of bond energy of oxygen gas at 0K
  • · Replies 2 ·
Replies
2
Views
2K
Chemistry Understanding the calculation of enthalpy of the formation of benzene
  • · Replies 3 ·
Replies
3
Views
3K
Chemistry How do we use enthalpy of formation in this calculation?
  • · Replies 9 ·
Replies
9
Views
2K
Chemistry Understanding chemical potential of gas in mixture versus pure gas, used in derivation of equilibrium constant
  • · Replies 1 ·
Replies
1
Views
2K
Standard Free Energy of Activation of a Reaction
  • · Replies 2 ·
Replies
2
Views
7K
Chemistry Does Combusting Different Amounts of Propane Change Final Temperature?
  • · Replies 5 ·
Replies
5
Views
2K
Chemistry Valence Bond Theory: Energy of a system with H and Cl atoms
  • · Replies 6 ·
Replies
6
Views
3K
Enthelpy and activation energy statements
  • · Replies 3 ·
Replies
3
Views
2K
Chemistry Thermochemistry and the heat of complete combustion
  • · Replies 4 ·
Replies
4
Views
2K
Chemistry A calculation of enthalpy, entropy, and Gibbs energy of vaporization
  • · Replies 1 ·
Replies
1
Views
2K