How much heat (in kJ) should be supplied to a rigid conducting vessel of volume $V$ liters, so that $0.5$ mole of C is formed in the reaction.
$A (g) + B (g) \to C (g) : Δ H = + 7.6 k J$
Take $R = 8 J / K m o l$ , $T = 300 K$ .

Question

How much heat (in kJ) should be supplied to a rigid conducting vessel of volume $V$ liters, so that $0.5$ mole of C is formed in the reaction.

$A (g) + B (g) \to C (g) : Δ H = + 7.6 k J$

Take $R = 8 J / K m o l$ , $T = 300 K$ .

TestHub · Accepted Answer

The reaction is: A ( g ) ​ + B ( g ) ​ → C ( g ) ​ Δ H = 7.6 k J . Δ n = 1 − 2 = − 1 . Δ U = Δ H − Δ n RT . Δ U = 7.6 − ( − 1 × 8 × 300/1000 ) Δ U = 7.6 + 2.4 = 10 k J For 0.5 m o l of C: q = 0.5 × 10 = 5 k J

Chemistry - Thermochemistry Question with Solution | TestHub

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JEE Advanced 2027 (Class 12+)