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MHT CET2009ChemistryThermodynamics (C)

Heat of combustion of methane is -800 ~kJ . What is the heat of combustion for 4 10⁻⁴ ~kg of methane?

Options

  1. A-800 ~kJ
  2. B-3.2 10⁴ ~kJ
  3. C-20 ~kJ
  4. D-1600 ~kJ

Correct answer

C. -20 ~kJ

Step-by-step solution

CH ₄+2 O ₂ CO ₂+2 H ₂ O ; H_ c =-800 ~kJ 16 ~g Heat of combustion of 16 10⁻³ ~kg CH ₄=-800 ~kJ Heat of combustion of 4 10⁻⁴ ~kg CH ₄ will be array l =- 800 4 10⁻⁴ 16 10⁻³ =-20 ~kJ array

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