Hi, I have some questions about the concepts of energy in chemistry. #1 A particular chemical reaction...

50.1K

Verified Solution

Question

Chemistry

Hi, I have some questions about the concepts of energy inchemistry.
#1 A particular chemical reaction has a negative deltaH and anegative deltaS. Which statement is correct?
The answer:
-The reaction becomes spontaneous as temperature decreases.
Can someone please explain to me how this is true?

#2 For the process O2(g)---> 2O(g), deltaH = +498kJ. What wouldbe predicted for the sign of deltaS(rxn) and the conditions underwhich this reaction would be spontaneous?
The answer:
deltaS(rxn)=positive & spontaneous at low temperaturesonly.
Can someone please elaborate on this?

#3 For which reaction, carried out at standard conditions, wouldboth the enthalpy and entropy changes drive the reaction in thesame direction?
Answer:
N2(g) + 2O2(g) ---> 2NO2(g) deltaH=+67.7
Why?

Answer & Explanation Solved by verified expert

4.0 Ratings (657 Votes)

All the three questions are related to the application of expression i Delta G Delta H T Delta S ii Making out the sign of Delta G note that a negative sign with Delta G represents spontaneous reaction 1 In this case a negative value of T due to decrease in temperature See Answer

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member