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MHT CET20226 Aug 2022Evening ShiftChemistryThermodynamics (C)Actual

When 2.0 ~g sucrose is oxidised forming CO ₂( ~g ) and H ₂ O _ ( ) the internal energy changes by 24 ~kJ . Calculate the value of H at 298 ~K in kJ / mol . (Molar mass of sucrose =342 ~g ~mol ⁻¹ )

Options

  1. A-140.3 ~J
  2. B2014 ~J
  3. C-5612 ~J
  4. D8208 ~J

Correct answer

A. -140.3 ~J

Step-by-step solution

aligned & C ₁₂ H ₂₂ O ₁₁( ~s )+12 O ₂( ~g ) 12 CO ₂( ~g )+11 H ₂ O ( c ) & ng =12-12=0 & H = E + ngRT & =24 ~kJ & H for 2 g sucrose =- 24 342 2 & =0.1403 ~kJ & =-140.3 ~J aligned

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