When enthalpy and entropy change for a chemical reaction are – 2.5 x 10³ cals

When Enthalpy And Entropy Change For A Chemical Reaction Are Chemistry Question

When enthalpy and entropy change for a chemical reaction are – 2.5 x 10³ cals and 7.4 cals deg⁻¹ respectively predict the reaction at 298 K is

Options

(a) irreversible
(b) reversible
(c) spontaneous
(d) non spontaneous

Correct Answer:

spontaneous

Explanation:

Enthalpy change, ∆H = -2.5 ⨯ 10³ cal

Entropy change, ∆G = 7.4 kcal deg⁻¹

Temperature, T = 298 K

As, ∆G = ∆H -T∆S

⇒ ∆G = -2.5 ⨯ 10³ – 298 ⨯ 7.4 = -ve value

For spontaneity of reaction, negative value of ∆G is required, so the reaction is spontaneous.

Related Questions:

  1. The acidic, basic or amphoteric nature of Mn₂O₇, V₂O₅ and CrO are respectively
  2. For a spontaneous process the correct statement is
  3. 2.5 Litre of 1 M NaOH solution mixed with another 3 litre of 0.5 M NaOH solution.
  4. The two electrons in K-subshell will differ in
  5. which of the following is an example of thermosetting polymer

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Your email address will not be published.


*