Chemistry - Thermochemistry Question with Solution | TestHub

Explain the question:

Find the internal energy change (ΔE) from the heat measured in a bomb calorimeter.

Concept:

Heat measured by a bomb calorimeter is at constant volume (q_v ), which is equal to the change in internal energy (ΔE).

Solution:

A bomb calorimeter is a device that measures the heat change of a reaction at a constant volume. The heat released or absorbed at constant volume (q_v ) is, by definition, equal to the change in the internal energy (ΔE) of the system. The problem states that the heat of combustion in a bomb calorimeter is – 670.48 Kcal mol^-1 .

Therefore, ΔE = q_v = –670.48 Kcal mol^-1 .