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COMEDK2016ChemistryThermodynamics (C)

The enthalpy of combustion of methane at 25^ C is 890 ~kJ . The heat liberated when 3.2 ~g of methane is burnt in air is

Options

  1. A-890 ~kJ
  2. B178 ~kJ
  3. C445 ~kJ
  4. D278 ~kJ

Correct answer

B. 178 ~kJ

Step-by-step solution

Heat liberated on combustion of 16 ~g CH ₄ is 890 ~kJ . Heat liberation from 3.2 ~g methane aligned &= 3.2 16 890= 890 5 &=178 ~kJ aligned

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