Chemical Thermodynamics Question 439
Question: The heat evolved in the combustion of benzene is given by
$ C_6H_6+7\frac{1}{2}O_2\to 6CO_2(g)+3H_2O(l);,\Delta H=-3264.6,kJ $
Which of the following quantities of heat energy will be evolved when $ 39,g,C_6H_6 $ are burnt
Options:
A) -816.15 kJ
B) -1632.3 kJ
C) -6528.2 kJ
D) -2448.45 kJ
Show Answer
Answer:
Correct Answer: B
Solution:
- 78g of benzene on combustion produces heat = - 3264.6 kJ
$ \therefore 39g $ will produce $ =\frac{-3264.6}{2}=-1632.3,kJ $ .
