Question

You have a series of four chemical reactions (1 --> 2 --> 3 --> 4). How do you calculate the (triangle) H2 if you know the other (triangle)H values?

Answer 1

You can calculate the change in enthalpy by adding the enthalpy of the other reactions. In my opinion, the correct answer from the choices listed above is the first option where the equation is expressed as:

ΔH2 = ΔH4 - (ΔH1 + ΔH2) 

Answer 2

The value of ΔH₂ will be calcultaed as ΔH₂ = ΔH₄ - (ΔH₁ + ΔH₂).

What is change in enthalpy?

Change in enthalpy of the reaction gives idea about the amount of heat released or absorbed during any chemical reaction.

In the question it is mention that series of four chemical reactions are from 1 to 4, means 4th one is the last reaction. So the calculation of the change in enthalpy is represented as:

ΔH₁ + ΔH₂ + ΔH₃ = ΔH₄

Value of ΔH₂, will be calculated as-

ΔH₂ = ΔH₄ - (ΔH₁ + ΔH₂)

Hence, option (1) is correct.

To know more about change in enthalpy, visit the below link:

https://brainly.com/question/11628413