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MHT CET202019 Oct 2020Morning ShiftChemistryThermodynamics (C)Actual

If 2 ~kJ of heat is released from system and 6 ~kJ of work is done on the system, what is enthalpy change of system?

Options

  1. A+8 k
  2. B+6 k J
  3. C-8 k ]
  4. D-2 k J

Correct answer

D. -2 k J

Step-by-step solution

(A) Q=-2 ~kJ , W=+6 ~kJ U=Q+W=-2+6=4 ~kJ Now, H= U-W=4-6=-2 k J

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