AP EAMCET · Chemistry · Thermodynamics (C)

Standard entropies of $X_{2}, Y_{2}$ and ${XY}_{3}$ are $60, 40$ and $50 J / K / mol$ respectively. At what temperature the following reaction will be at equilibrium

A $500 K$
B $750 K$
C $1000 K$
D $1250 K$

Verified Solution

Answer & Solution

Correct Answer

(B) $750 K$

Step-by-step Solution

Detailed explanation

So from this question we know that enthalpy for the reaction is -30 KJ 12X2 + 32Y2 → XY3 ∆H = -30 KJ So we know from the concept of standard entropies is…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Standard entropies of X2,Y2 and XY3 are 60,40 and 50 J/K/mol respectively. At what temperature the following reaction will be at equilibrium

Step-by-step Solution

Standard entropies of $X_{2}, Y_{2}$ and ${XY}_{3}$ are $60, 40$ and $50 J / K / mol$ respectively. At what temperature the following reaction will be at equilibrium