Chemical Thermodynamics Question 133
Question: $ 2C+O_2\to 2CO;\Delta H=-220,kJ $ Which of the following statement is correct for this reaction [BVP 2004]
Options:
A) Heat of combustion of carbon is 110 kJ
B) Reaction is exothermic
C) Reaction needs no initiation
D) All of these are correct
Show Answer
Answer:
Correct Answer: B
Solution:
$ 2C+O_2\to 2CO $ ; $ \Delta H=-220,KJ $ This reaction does not represent complete combustion of carbon, hence heat of combustion of carbon will not be equal to $ 110,kJ $ . The negative sign of $ \Delta H $ indicates that this reaction is exothermic. Also, despite being spontaneous reaction, it requires initiation.
