For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter `DeltaU`and`w` correspond to

Options

A. `DeltaU lt 0, w =0`
B. `DeltaU lt 0, w lt 0`
C. `DeltaU gt 0, w gt 0`
D. `Delta U gt 0, w gt 0`

Answer

A

Explanation

In bomb calorimeter, volume is constant, so, w=0 and `DeltaU=q`.
Since, q is calculated by the change in temperature of calorimeter, we have to notice the sign of `DeltaU`. For example `DeltaU` is negative and for endothermic `DeltaU` is `+ve`.