Question

For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, $△U$ and W correspond to

• A. $△U<0,W=0$
• B. $△U=0,W<0$
• C. $△U>0,W=0$
• D. $△U=0,W>0$

Answer 1

The correct option is A $△U<0,W=0$

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 $△U=q.$.since, reaction is exothermic , heat will released .Thus it has $△U<0,$ W = 0.