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Chapter 5: Q39 E (page 271)

Explain how the heat measured in example 5.5 differs from the enthalpy change for the endothermic reaction described by the following equation

HCl(aq)+NaOH(aq) 鈫� NaCl(aq)+H2O(I)

Short Answer

Expert verified

The equation mentioned above differs from the reaction mentioned in example 5.5 in terms of several moles.

Step by step solution

01

Definition of Enthalpy

Enthalpy is simply the sum of the internal energy and the product of pressure and volumeH = U + PV

The capacity of a system to do work is the energy of the system. Work is done on or by the system.

When the energy of a system changes as a result of the temperature difference between the system and its surroundings, we refer to that energy transfer as heat (q).

02

Difference

In example 5.5, the heat of the reaction is measured, whereas, in the above equation, the enthalpy of the reaction is mentioned.

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