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JEE Main201911 Jan 2019Evening ShiftChemistryThermodynamics (C)Actual

The reaction MgO ( s )+ C ( s ) Mg ( s )+ CO ( g ), for which H ^ =+491.1 ~kJ ~mol ⁻¹ and S ^ =198.0 JK ⁻¹ ~mol ⁻¹ is not feasible at 298 ~K . Temperature above which reaction will be feasible is

Options

  1. A2040.5 ~K
  2. B1890.0 ~K
  3. C2480.3 ~K
  4. D2380.5 ~K

Correct answer

C. 2480.3 ~K

Step-by-step solution

MgO ( s )+ C ( s ) Mg ( s )+ CO ( g ) For a reaction to be spontaneous G H ^ S ^ T > 491.1 1000 198 T >2480.3 ~K

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