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JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry

अभिक्रिया \(H _2 F _2( g ) \rightarrow H _2( g )+ F _2( g )\) के लिए \(27^{\circ} C\) पर \(\Delta U =-59.6\,kJ\,mol ^{-1}\) है।उपर्युक्त अभिक्रिया के लिए एन्थैल्पी परिवर्तन \((-) .......kJ mol ^{-1}\) है। [निकटतम पूर्णाक](दिया गया है: \(R =8.314\,JK ^{-1}\,mol ^{-1}\) )

  1. A \(57\)
  2. B \(55\)
  3. C \(56\)
  4. D \(54\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(57\)

Step-by-step Solution

Detailed explanation

\(\Delta H =\Delta U +\Delta n _{ g } RT\) \(\Delta H =-59.6+1 \times 8.314 \times 300 \times 10^{-3}=-57.10\)
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