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AP EAMCET2003ChemistryThermodynamics (C)

When 10 ~g of methane is completely burnt in oxygen, the heat evolved is 560 ~kJ . What is the heat of combustion (in kJ mol ⁻¹ ) of methane?

Options

  1. A-1120
  2. B-968
  3. C-896
  4. D-560

Correct answer

C. -896

Step-by-step solution

CH ₄+2 O ₂ CO ₂+2 H ₂ O 10 ~g H=-560 ~kJ (12+4=16) g=1 ~mole The heat of combustion of 10 ~g CH ₄=-560 ~kJ So, the heat of combustion of 16 ~g CH ₄= -560 10 16=-896 ~kJ / mol

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