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Midterm 6A

Posted: Sat Mar 14, 2020 12:12 pm
by Siddiq 1E
Hi, I had a question about 6A on the midterm:
Hydrochloric acid is a naturally-occurring component of the gastric acid produced in
the digestive systems of most animal species, including humans. Consider this
equation for the formation of HCl:

2H2(g) + 2Cl2(g) → 4 HCl(g) ∆Ho = –92.3 kJ

Which statement about this information is incorrect? Ans ____C (3pt)
(A) If the equation is reversed, the ∆Ho value equals +92.3 kJ.
(B) The four HCl bonds are stronger than the four bonds in H2 and Cl2.
(C) The ∆Ho value will be –92.3 kJ when HCl(l) is produced.
(D) 23.1 kJ of heat will be evolved when 1 mol of HCl(g) is produced.

---- How do you know that the four HCl bonds are stronger than the bonds in H2 and Cl2?

Re: Midterm 6A

Posted: Sat Mar 14, 2020 12:22 pm
by Benjamin Feng 1B
The stronger the bond, the more energy is needed to break them. As the reaction is exothermic, you will need to input energy to get it back to the initial state so the final products bonds are stronger and more stable.