Question

Which statement is FALSE? ?E<sub>rxn</sub> is a measure of heat. Enthalpy is the sum of a system's internal energy and the product of pressure and volume. Endothermic has a positive ?H. ?H<sub>rxn</sub> is the heat of reaction. An exothermic reaction gives heat off heat to the surroundings.

          Which statement is FALSE?
?E<sub>rxn</sub> is a measure of heat.
Enthalpy is the sum of a system's internal energy and the product of pressure and volume.
Endothermic has a positive ?H.
?H<sub>rxn</sub> is the heat of reaction.
An exothermic reaction gives heat off heat to the surroundings.

Which statement is FALSE?
?E<sub>rxn</sub> is a measure of heat.
Enthalpy is the sum of a system's internal energy and the product of pressure and volume.
Endothermic has a positive ?H.
?H<sub>rxn</sub> is the heat of reaction.
An exothermic reaction gives heat off heat to the surroundings.

Added by Ethan F.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Sri K

03/10/2023

Step 1

$\Delta E_{rxn}$ represents the change in internal energy of a system, which is not solely a measure of heat. Heat is only one form of energy transfer. Work is another. Therefore, this statement is FALSE. Enthalpy ($H$) is defined as $H = U + PV$, where $U$ is Show more…

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Which statement is FALSE? $\Delta E_{rxn}$ is a measure of heat. Enthalpy is the sum of a system's internal energy and the product of pressure and volume. Endothermic has a positive $\Delta H$. $\Delta H_{rxn}$ is the heat of reaction. An exothermic reaction gives heat off heat to the surroundings.