Why do bomb calorimeters measure ΔE if ΔH equals ΔE at constant volume?

[henry3369]

Homework Statement

My book says that bomb calorimeters are used to measure ΔE while coffee cup calorimeters are used to measure ΔH. Isn't ΔE for bomb calirometers the same as ΔH?

Homework Equations

The Attempt at a Solution

Bomb Calorimeter:
ΔH = ΔE + PΔV = ΔE (since, constant volume).
So ΔH = ΔE.
So does that mean no work is done in bomb calorimeters and the change in energy is entirely due to the transfer of thermal energy?

 

[Raghav Gupta]

You have written wrong equation.
It is actually ΔH= ΔE + ΔPV