For a reaction, A g → A l ; ΔH = - 3 RT . The correct statement for the reaction is

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ChemistryThermodynamics - IFirst law of ThermodynamicsEasy2 minPYQ_2017

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For a reaction, $A (g) \to A (l); ΔH = - 3 RT .$ The correct statement for the reaction is

Answer:

Solution:

$∆ H = ∆ U + ∆ n_{g} RT$

$∆ n_{g} = n_{p} - n_{r} = 0 - 1 = - 1$

$∆ H = ∆ U + (- 1) RT ∆ H = ∆ U - RT$

Given, $∆ H = - 3 RT$

$- 3 RT = ∆ U + (- 1) RT ∆ U = - 3 RT + RT = - 2 RT$

$|∆ H| > |∆ U|$

Stream:JEESubject:ChemistryTopic:Thermodynamics - ISubtopic:First law of Thermodynamics

⏱ 2mℹ️ Source: PYQ_2017

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