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MHT CET202314 May 2023Evening ShiftChemistryChemical KineticsActual

For a reaction A + B products H is -84.2 ~kJ and S is -200 ~J ~K ⁻¹ . Calculate the highest value of temperature so that the reaction will proceed in forward direction.

Options

  1. A421 ~K
  2. B237 ~K
  3. C168 ~K
  4. D273 ~K

Correct answer

A. 421 ~K

Step-by-step solution

aligned T & = H S T & = -84200 ~J -200 ~J ~K ⁻¹ =421 ~K aligned Since H and S are negative, the reaction is spontaneous at low temperatures. Therefore, the highest temperature is 421 ~K and the reaction will proceed in forward direction spontaneously below 421 ~K .

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