Chemistry - Thermodynamics - I Question with Solution | TestHub

ChemistryThermodynamics - IFirst law of ThermodynamicsMedium2 minPYQ_2020

ChemistryMediumsingle choice

For the combustion reaction at $298 K$ $2 Ag (s) + 1/2 O_{2} (g) ⟶ 2 Ag_{2} O (s)$ Which of the following alternatives is correct?

Options:

Answer:

Solution:

$Δ H = Δ U + Δ nRT$ $Δ n = n_{p} - n_{R}$ Now, $Δ n = 2 - \frac{5}{2} = - \frac{1}{2}$ $∴ Δ H = Δ U - \frac{1}{2} RT$ Thus, $Δ U = Δ H + \frac{1}{2} RT$ $∴ Δ U > Δ H$

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

⏱ 2mℹ️ Source: PYQ_2020

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