Answer: materials and design Techniques that reduce the negative environmental impact of a structure
Explanation:
Answer:
What Structures??
Explanation:
Can you please explain the question more
Answer: 
Explanation:
Heat of reaction or enthalpy change is the energy released or absorbed during the course of the reaction.
It is calculated by subtracting the enthalpy of reactants from the enthalpy of products.

= enthalpy change = ?
= enthalpy of products
= enthalpy of reactants
For the given reaction :


