Chemical Thermodynamics Question 276

Question: The enthalpy of combustion of $ C_6{H_{6(l)}} $ is - 3250 kJ. When 0.39 g of benzene is burnt excess of oxygen in an open vessel, the amount of heat evolved is [KCET 2000; AFMC 2000; DCE 2000]

Options:

A) 16.25 J

B) 16.25 kJ

C) 32.5 J

D) 32.5 kJ

Show Answer

Answer:

Correct Answer: B

Solution:

Heat evolved during combustion of 0.39g $ C_6H_6=\frac{3250\times 0.39}{78}=16.25,kJ. $



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