Answer:
Explanation:
The question must be restated because you can calculate ΔH₂ from the other reactions only if you know the global ΔH, ΔH₁, and ΔH₃.
As stated by Hess’s law, the overall change in the enthalpy, ΔH, of a reaction does not depend of the path followed. Thus, when you have a series of reactions, the net change from the first reaction to the last reaction is equal to the sum of the ΔH values for the individdual reactions:
If you name ΔH₄, the overal change in the enthalpy to convert 1 to 4, but ΔH₁, ΔH₂, and ΔH₃ are the changes of the intermediate reactions that transform 1 in 2, 2 in 3, and 3 in 4, respectively, then, you can write, accordingly to Hess's law, you can write:
Then, assuming you know ΔH₄, ΔH₁, and ΔH₃, you can calculate ΔH₂ clearing from the previous equation:
- ΔH₂ = ΔH₄ - (ΔH₁ + ΔH₃) ← answer
Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.
Salutations!
<span>___ Particles of which of the following have the greatest thermal energy
Gas is the particle that has the greatest thermal energy. Gas has the greatest thermal energy because the movement between particles is clump. This thermal energy is then converted into kinetic energy.
Thus, your answer is option C.
Hope I helped (:
Have a great day!</span>
Yes,sr8 facts, mhm, agree