Chemical Thermodynamics Question 95

Question: For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, $ \Delta U $ and w correspond to [AIIMS 2005]

Options:

A) $ \Delta U<0,\ w=0 $

B) $ \Delta U=0,\ w<0 $

C) $ \Delta U>0,\ w=0 $

D) $ \Delta U<0,\ w>0 $

Show Answer

Answer:

Correct Answer: A

Solution:

Bomb calorimeter is commonly used to find the heat of combustion of organic substances which consists of a sealed combustion chamber, called a bomb. If a process is run in a sealed container then no expansion or compression is allowed, so w = 0 and ∆U = q. ∆U < 0, w = 0



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