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MHT CET20255 May 2025Evening ShiftChemistryThermodynamics (C)Actual

For a certain reaction H=-225 ~kJ and S=-150 JK ⁻¹ . Find the temperature so that G is zero.

Options

  1. A1500 K
  2. B1450 K
  3. C1340 K
  4. D1300 K

Correct answer

A. 1500 K

Step-by-step solution

The temperature where G becomes zero corresponds to the condition G = H - T S = 0 . For H = -225 kJ and S = -150 JK ⁻¹ , convert H to consistent units: H = -225, !000 J . Solving 0 = H - T S yields T = H S = -225, !000 J -150 JK ⁻¹ = 1, !500 K . The temperature at which G = 0 is therefore 1, !500 K . The correct option is A.

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