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What volume of oxygen at STP is required to affect the combustion of 11 litres of ethylene at 273°C and 380 mm of Hg pressure?  Answer in my book : 8.25 litres
Asked by singhamaya63 | 24 Feb, 2020, 11:50: AM

### Given:P = 380 mmHg   = 0.5 atmT = 273 °C   = 273+273   = 546 KV = 11 litreNo. of moles = nWe have,PV = nRTThe reaction is :So for 1 mol of C2H4 combines with 3 mol of O2Now 0.122 moles of C2 H4  will combine with 0.122×3                                                                = 0.368 molVolume of 1 mole of gas is 22.4 litreVolume of 0.368 mol = 22.4 × 0.368                                = 8.24 litreVolume of oxygen is 8.24 litre.

Answered by Ravi | 24 Feb, 2020, 12:40: PM

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