When one mole of sulphuric acid react with one mole of zinc dust in a bomb calorimeter, then $∆\mathrm{U}$ and work done correspond to

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 $\mathrm{w}=0\text{ and }\mathrm{\Delta U}=\mathrm{q}\cdot \mathrm{\Delta U}<0,\mathrm{w}=0$