In which of the following conditions a chemical reaction can not occur

In Which Of The Following Conditions A Chemical Reaction Can Chemistry Question

In which of the following conditions a chemical reaction can not occur

Options

(a) ΔH and ΔS increase and TΔS > ΔH
(b) ΔH and ΔS decrease and ΔH > TΔS
(c) ΔH increases and ΔS increases
(d) ΔH decreases and ΔS increases

Correct Answer:

ΔH increases and ΔS increases

Explanation:

(i)When ΔH and ΔS increase, then , if TΔS > ΔH the reaction is spontaneous.
Therefore ΔG = ΔH – TΔS = -ve.
(ii)When ΔH and ΔS decrease,then if ΔH > TΔS. This makes ΔG is -ve and process is spontaneous.
(iii) If , ΔH increases and ΔS decreases, then ΔG is +ve and process is non-spontaneous.
(iv) If ΔH decrease and ΔS increases, then ΔG is -ve and process is spontaneous.

Related Questions:

  1. In a closed insulated container a liquid is stirred with a paddle to increase
  2. The species having maximum stability is
  3. The normality of solution containing 31.5g of hydrated oxalic acid (H₂C₂O₄.2H₂O)
  4. Benzenamine reacts with excess bromine to produce
  5. Which among the following is an extensive property of the system

Topics: Thermodynamics (179)
Subject: Chemistry (2512)

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*