claudzterz9 said:I am not sure how to find this... estimate the energy change that occurs when carbon monoxide and chlorine combine to make phosgene...
CO(g) + Cl2(g) ---> Cl2CO(g)
i have an idea of what to do,except i think its not the right way.
claudzterz9 said:I am not sure how to find this... estimate the energy change that occurs when carbon monoxide and chlorine combine to make phosgene...
CO(g) + Cl2(g) ---> Cl2CO(g)
i have an idea of what to do,except i think its not the right way.
lightarrow said:If your problem is to estimate it from given bond energies, as Kushal wrote, then in the reaction
CO(g) + Cl2(g) ---> COCl2(g)
1. You go from a triple bond in CO to a double bond between C and O in COCl2; so you have to compute this difference of energy.
2. You loose a Cl-Cl bond and you gain 2 C-Cl bonds
So, calling E1 the energy of the triple bond between C and O, E2 the energy of double bond between C and O in phosgene, E3 the bond energy Cl-Cl and E4 the bond energy C-Cl, you have, as estimated reaction energy:
E2 - E1 + 2E4 - E3 ~ 128 kJ/mol with the data I've found (but remember there is quite variation on these kind of data).
Edit. The reaction enthalpy is the same but with sign changed.
The formula for calculating energy change for CO + Cl2 reactions is ΔH = ΣH(products) - ΣH(reactants), where ΔH is the change in enthalpy and ΣH is the sum of the enthalpies of the products and reactants.
The enthalpy of a substance can be determined by measuring the amount of heat released or absorbed during a reaction. It can also be calculated using Hess's Law, which states that the enthalpy change of a reaction is the sum of the enthalpy changes of its individual steps.
Yes, the energy change for CO + Cl2 reactions can be negative. A negative value indicates that the reaction is exothermic, meaning that heat is released during the reaction.
The energy change for CO + Cl2 reactions can be affected by factors such as temperature, pressure, and the concentrations of the reactants and products. Changes in these factors can alter the equilibrium of the reaction, leading to a different energy change.
The energy change for CO + Cl2 reactions is directly related to the overall stability of the products. A more negative energy change indicates a more stable product, as the reaction releases more energy in the form of heat. Conversely, a less negative or positive energy change indicates a less stable product.