Q3. Solve any TWO (2) of the following numerical questions. i) Calculate the work associated with the expansion of a gas from 40 L to 75 L at a constant external pressure of 10 atm. ii) What is the volume (in liters) occupied by 70 g of HCl at STP? (Atomic weight Cl = 35.5 andH=1) iii) A sample of gas at 20 °C has a volume of 3.55 L. What volume will this gas occupy at 45 °C ?

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