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MHT CET2011ChemistryThermodynamics (C)

The heat of combustion of carbon is -393.5 ~kJ / mol . The heat released upon the formation of 35.2 ~g of CO ₂ from carbon and oxygen gas is

Options

  1. A+315 ~kJ
  2. B-31.5 ~kJ
  3. C-315 ~kJ
  4. D+31.5 ~kJ

Correct answer

C. -315 ~kJ

Step-by-step solution

aligned C + O ₂ CO ₂ & & H=-393.5 ~kJ / mol aligned Heat released upon the formation of 44 ~g of CO ₂=-393.5 ~kJ Heat released upon the formation of 1 ~g of CO ₂= -393.5 44 ~kJ Heat released upon the formation of 35.2 ~g of aligned CO ₂ &= -393.5 44 35.2 & -315 ~kJ aligned

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