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Standard XII

Chemistry

Spontaneity

Which of the ...

Question

Which of the following set of condition necessarily implies a spontaneous process?

Exothermic reaction with increasing disorder

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Endothermic reaction with increasing disorder

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Exothermic reaction with decreasing disorder

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Endothermic reaction with decreasing disorder

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Solution

The correct option is A Exothermic reaction with increasing disorder
Solution:- (A) Exothermic reaction with increasing disorder
For a spontaneous reaction
$Δ H = - v e$
$Δ S = + v e$
Spontaneity depends upon both critical minimum energy and maximum randomness or disorder.

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Similar questions

Q. The variation of K and

K_{f}

as well as

K_{b}

with temperature shows the following effects:
(i) For endothermic reaction K increases and

K_{f}

as well as

K_{b}

also increases with temperature.
(ii) For endothermic reaction K decreases and

K_{f}

as well as

K_{b}

also decreases with temperature.
(iii) For exothermic reaction K decreases and

K_{f}

as well as

K_{b}

both increases with temperature.
(iv) For exothermic reaction K increases and

K_{f}

as well as

K_{b}

decreases with temperature.
(v) For exothermic reaction K decreases and

K_{f}

as well as

K_{b}

both decreases with temperature.

Q. Assertion :The value of K for a reaction may increase or decrease with increase in temperature depending upon whether the reaction is exothermic or endothermic. Reason: With increase in temperature, the extent of reaction increases.

Which of the following statements are in accordance with the Arrhenius equation?
(a) Rate of a reaction increases with increase in temperature
(b) Rate of a reaction increases with a decrease in activation energy
(c) Rate constant decreases exponentially with an increase in temperature
(d) Rate of reaction decreases with a decrease in activation energy

Q. Assertion :A reaction which is spontaneous and accompanied by decrease of randomness must be exothermic. Reason: All exothermic reactions are accompanied by decrease of radomness.

Q. Assertion :A reaction which is spontaneous and accompanied by decrease of randomness must be exothermic. Reason: All exothermic reactions are accompanied by decrease of randomness.

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Which of the following set of condition necessarily implies a spontaneous process?

The correct option is A Exothermic reaction with increasing disorderSolution:- (A) Exothermic reaction with increasing disorderFor a spontaneous reaction ΔH=−veΔS=+veSpontaneity depends upon both critical minimum energy and maximum randomness or disorder.

The correct option is A Exothermic reaction with increasing disorder
Solution:- (A) Exothermic reaction with increasing disorder
For a spontaneous reaction
$Δ H = - v e$
$Δ S = + v e$
Spontaneity depends upon both critical minimum energy and maximum randomness or disorder.