220k views
2 votes
HHEELLPP!!!!

Which expression represents the ∆H for a chemical reaction in terms of the potential energy, PE, of its products and reactants?

A. PE of products + PE of reactants
B. PE of products – PE of reactants
C. PE of reactants × PE of products
D. PE of products ÷ PE of reactants
E. PE of reactants – PE of products

User Alora
by
7.8k points

2 Answers

3 votes
B. PE of products – PE of reactants
User Bucky
by
8.2k points
4 votes

Answer:

B. PE of products – PE of reactants

Step-by-step explanation:

The enthalpy, H, reference to the amount of energy that a thermodynamic system exchanges with its environment, that is, the amount of energy that the system absorbs or releases. Its difference is calculated between the final and initial states of the system, so in a chemical reaction the final state is the one of the products and the initial state is the one of the reactants. By convention, this kind of difference are always the final state minus the initial state.

User Andreas Mueller
by
9.0k points

Related questions

asked Feb 28, 2018 47.0k views
Sanjeev Yadav asked Feb 28, 2018
by Sanjeev Yadav
7.7k points
2 answers
3 votes
47.0k views
asked Sep 20, 2018 217k views
Nclu asked Sep 20, 2018
by Nclu
8.8k points
2 answers
3 votes
217k views