menu search
brightness_auto
Feel free to answer or ask any questions.
If you are new here please see how to use or FAQ.
more_vert
For a given reaction, $\Delta$H = 35.5 kJ mol-1 and $\Delta$S = 83.6 J K-1 mol-1. The reaction is spontaneous at (Assume that $\Delta$H and $\Delta$S do not vary with temperature.)

(a) T > 425 K

(b) all temperatures

(c) T > 298 K

(d) T < 425 K
thumb_up_off_alt 2 like thumb_down_off_alt 0 dislike

1 Answer

more_vert
 
done_all
Best answer
Ans: (a) T > 425 K

Sol. For a spontaneous reaction,

$ΔG < 0 \text{ } i.e., ΔH - TΔS < 0$

$T> {ΔH \over ΔS}$

$T> \left({{35.5 \times1000 \over 83.6}=424.6\approx425 K}\right)$

∴ T > 425 K
thumb_up_off_alt 1 like thumb_down_off_alt 0 dislike
Welcome to Jee Neet QnA, where you can ask questions and receive answers from other members of the community.

Most active Members

this week:

    1,101 questions

    731 answers

    345 comments

    58 users

    ...