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MHT CET202015 Oct 2020Morning ShiftChemistryThermodynamics (C)Actual

What is the value of S _ ( total ) for following reaction at 300 ~K Fe ₂ O _ 3( ~s ) +3 CO _ ( g ) 2 Fe _ ( s ) +3 CO _ 2( ~g ) H ^ =-25 ~kJ , S ^ =15 JK ⁻¹

Options

  1. A68 2 JK ⁻¹
  2. B98 3 JK ⁻¹
  3. C8 32 JK ⁻¹
  4. D-10 0 JK ⁻¹

Correct answer

B. 98 3 JK ⁻¹

Step-by-step solution

The reaction the exothermic, aligned H_ sur &=+25 ~kJ =25000 ~J S_ sur &= H_ arr T = 25000 ~J 300 ~K =83.33 JK ⁻¹ S_ ton 1 &= S_ sys + S_ surr &=15 JK ⁻¹+83.33 JK ⁻¹ S_ tow &=98.33 ~J ~K ⁻¹ aligned

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