Chemical Thermodynamics Question 302

Question: $ {C_{dia}} $ + $ O_2\to CO_2; $

$ \Delta H=-395.3,kJ/mole $

$ C_{gr}+O_2\to CO_2;,\Delta H=-393.4,kJ/mole $

$ C_{gr}\to {C_{dia}};,\Delta H= $ [BHU 2003]

Options:

A) - 3.8

B) - 1.9

C) + 3.8

D) + 1.9

Show Answer

Answer:

Correct Answer: D

Solution:

By (ii) - (i), $ C_{gr}\to C_{dia},,\Delta H=+1.9 $ .



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