1.
Hess's law _____.
A.) makes it possible to calculate H for complicated chemical reactions
B.) states that when you reverse a chemical equation, the sign of H does not change
C.) determines the way a calorimeter works
D.) describes the vaporization of solids
Please help me. I cannot fingure this out.
Thank You
1. Hess's law ____.
(1 point)
(1 pt) makes it possible to calculate H for complicated chemical reactions
(0 pts) states that when you reverse a chemical equation, the sign of H does not change.
(0 pts) determines the way a calorimeter works
(0 pts) describes the vaporization of solids
The answer is A.
See your later post.
Did you ever get an answer??
To find the answer to this question, let's break down each option and identify which one aligns with the concept of Hess's law.
A) Makes it possible to calculate H for complicated chemical reactions: This option correctly describes Hess's law. It states that the enthalpy change (H) for a chemical reaction is independent of the pathway taken. This means that you can calculate the overall enthalpy change of a reaction by summing the enthalpy changes of a series of simpler reactions.
B) States that when you reverse a chemical equation, the sign of H does not change: Although this is a valid statement about enthalpy changes, it is not specific to Hess's law. Reversing a chemical equation is a general principle known as the reversal rule, but it is not the core idea behind Hess's law.
C) Determines the way a calorimeter works: This statement is incorrect. A calorimeter is a device used to measure the heat energy transferred during a chemical reaction or physical process. It is not directly related to Hess's law.
D) Describes the vaporization of solids: This statement is also incorrect. The concept of vaporization of solids is not directly related to Hess's law.
Therefore, the correct answer is A) Makes it possible to calculate H for complicated chemical reactions.