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QNEET-2013-Ch-1548: NEET 2013 Chemistry - Class 11 NEET-2013-Ch-1548 Solution: When 5 litres of a gas mixture of methane and propane is…

When 5 litres of a gas mixture of methane and propane is perfectly combusted at 0∘C0^\circ C and 1 atmosphere 16 litres of oxygen at the same temperature and pressure is consumed. The amount of heat released from this combustion in kJ (ΔHcomb.(CH4)=890 kJ mol−1\Delta H_{comb.}(CH_4) = 890\ \text{kJ mol}^{-1} ΔHcomb.(C3H8)=2220 kJ mol−1\Delta H_{comb.}(C_3H_8) = 2220\ \text{kJ mol}^{-1}) is 38 317 477 32

Multiple Choice Options

  • A 38
  • B 317
  • C 477
  • D 32

Step-by-Step Verified Solution

CH 4 + 2O 2 _ CO 2 + 2H 2 O C 3 H 8 + 5O 2 _ 3CO 2 + 4H2 O CH 4 + C 3 H 8 = 5 22.4 = 0.22 moles. O 2 = 16 22.4 = 0.71 moles 2 x + ( 0.22 _ x ) 5 = 0.71 x = 0.13 Heat liberated = 0.13 _ 890 + 0.09 _ 2220 = 316 kJ

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