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MHT CET202611 April 2026Evening ShiftChemistryHydrocarbonsActual

200 mL of ethylene gas and 150 mL of HCl gas were allowed to react at 1 bar. Pressure to form gaseous ethyl chloride. What is the work done during the reaction?

Options

  1. A15 J
  2. B30 J
  3. C150 J
  4. D300 J

Correct answer

A. 15 J

Step-by-step solution

The balanced chemical equation for the reaction is: C₂H₄(g) + HCl(g) C₂H₅Cl(g) Initial volumes: V_ C₂H₄ = 200 mL V_ HCl = 150 mL Total initial volume V_i = 200 + 150 = 350 mL. Since the reaction occurs at constant pressure and temperature, the volumes of gases are directly proportional to their number of moles. Here, HCl is the limiting reagent. Volume of C₂H₄ reacted = 150 mL Volume of C₂H₄ remaining = 200 - 150 = 50 mL Volume of C₂H₅Cl formed = 150 mL Total final volume V_f = 50 + 150 = 200 mL. Change in volume V

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