[Four-digit Integer] An LPG cylinder weighs 14.8 kg when empty. When full, it weighs 28.8 kg and shows a pressure of 35.5 atm. In the course of use at 300 K, the weight of the full cylinder is reduced

Question

[Four-digit Integer] An LPG cylinder weighs 14.8 kg when empty. When full, it weighs 28.8 kg and shows a pressure of 35.5 atm. In the course of use at 300 K, the weight of the full cylinder is reduced to 23.2 kg. Assume LPG to be n-butane with normal boiling point of 273 K. If ab = 1/100 × the volume (in litre) of the gas used up at the normal usage conditions, and cd = final pressure (in atm) inside the cylinder, then the value of abcd is

Prashant Kotian · Accepted Answer

Correct answer: 0210. Remaining LPG kg (liquid phase present). While liquid exists, cylinder pressure = saturated vapour pressure of n-butane at 300 K. Using Clausius-Clapeyron ( K, kJ/mol): atm. Answer:

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