Shristy posted an Question
August 22, 2020 • 01:54 am 30 points
  • IIT JAM
  • Chemistry (CY)

At 20°c, the standard emf of a certain cell is +0.2699 v, and at 30°c it is +0.2669 v. what can you say about the standard entropy of this reaction? assume that

At 20°C, the standard EMF of a certain cell is +0.2699 V, and at 30°C it is +0.2669 V. What can you say about the standard entropy of this reaction? Assume that the standard AH° and AS° are independent of temperature: (a) AS° = 0o (b) AS° (C) AS=-ve (d) None of these.

2 Answer(s) Answer Now
  • 0 Likes
  • 3 Comments
  • 0 Shares
  • comment-profile-img>
    Priyanshu kumar Best Answer

    Option C delta S is negative

    eduncle-logo-app

    explanation ?

    eduncle-logo-app

    As per temperature coefficient of cell, dS= nF[dE/dT] at constant pressure Here we can se that as temp. Increase E is decrease it means if we take T as positive then E will be negative. So, here [dE/dT] this ratio will be negative which is directly proportional to the entropy change. Hence, we can say that dS= (-ve)

    eduncle-logo-app

    Got this??

    eduncle-logo-app

    aise ni hoskta sir ??

    eduncle-logo-app

    shristy value change hai yha pe

    eduncle-logo-app

    0.2699 and 0.2669

    eduncle-logo-app

    now got shristy??

    eduncle-logo-app

    ok sir got it

    eduncle-logo-app

    😊👍

whatsapp-btn

Do You Want Better RANK in Your Exam?

Start Your Preparations with Eduncle’s FREE Study Material

  • Updated Syllabus, Paper Pattern & Full Exam Details
  • Sample Theory of Most Important Topic
  • Model Test Paper with Detailed Solutions
  • Last 5 Years Question Papers & Answers