Chemical Thermodynamics Question 490

Question: One gram of an organic liquid X (molecular mass 78) liberates 160 J of heat on solidification. $ \Delta H_{fusion}(A) $ is:

Options:

A) 19.2 kJ/mol

B) 12.48 kJ/mol

C) 124.8 kJ/mol

D) None of these

Show Answer

Answer:

Correct Answer: B

Solution:

  • For 1 g liberates 160 J

$ \therefore $ 78 g liberates $ 160\times 78=1280,J/mol $

$ 12.480,kJ/mol $



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