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

Question

For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, Δ U and W corresponds to (A) Δ U<0,W=0 (B) Δ U<0,W<0 (C) Δ U>0,W=0 (D) Δ U>0,W>0

Tardigrade Admin · Accepted Answer

In bomb calorimeter, heat of combustion is determined at constant volume, hence heat of reaction corresponds to Δ U Δ U<0 W=0

Q. For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, $Δ U$ and W corresponds to

$Δ U < 0, W = 0$

$Δ U < 0, W < 0$

$Δ U > 0, W = 0$

$Δ U > 0, W > 0$

In bomb calorimeter, heat of combustion is determined at constant volume, hence heat of reaction corresponds to
$Δ U$
$Δ U < 0$
$W = 0$

Q. For the reaction of one mole of zinc dust with one mole of sulphuric acid in a bomb calorimeter, ΔU and W corresponds to

ΔU<0,W=0

ΔU<0,W<0

ΔU>0,W=0

ΔU>0,W>0