Calculate the Expansion Work Done on the System When Exactly

question 11

Multiple Choice

Calculate the expansion work done on the system when exactly 1 mol of solid ammonium chloride, NH₄Cl, decomposes completely to yield gaseous ammonia, NH₃ and hydrogen chloride, HCl at a temperature of 1250 K. Treat the expansion as irreversible and the gases formed as perfect.

• A) -15.4 kJ
• B) -4.96 kJ
• C) -16.6 kJ
• D) -20.8 kJ

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