Which is not characteristic of a thermochemical equation?...

Name: Problem 3, Chapter 6: Objective Chemistry for Engineering and Medical Entrance Examinations
Uploaded: 2022-01-25T06:44:51-08:00
Duration: 41 s
Channel: Mishal Gul
Description: Which is not characteristic of a thermochemical equation? (1) It indicates physical state of reactants and products. (2) It indicates whether the reaction is exothermic or endothermic. (3) It indicates allotrope of the reactants if present. (4) It indicates whether a reaction would oecur or not.

Which is not characteristic of a thermochemical equation? (1) It indicates physical state of reactants and products. (2) It indicates whether the reaction is exothermic or endothermic. (3) It indicates allotrope of the reactants if present. (4) It indicates whether a reaction would oecur or not.

Which is not characteristic of a thermochemical equation?
(1) It indicates physical state of reactants and products.
(2) It indicates whether the reaction is exothermic or endothermic.
(3) It indicates allotrope of the reactants if present.
(4) It indicates whether a reaction would oecur or not.

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Key Concepts

Physical State Notation

Physical state notation in chemical equations involves indicating the state of matter of each reactant and product using symbols such as (s) for solid, (l) for liquid, (g) for gas, and (aq) for aqueous solutions. This aspect is often included in thermochemical equations to provide more detailed information about the substances involved.

Thermochemical Equation

A thermochemical equation is a chemical equation that explicitly shows the heat absorbed or released during a reaction. It includes the standard chemical species along with an energy term, typically denoted as ?H, which indicates the overall enthalpy change of the reaction.

Reaction Enthalpy

Reaction enthalpy is the quantitative measure of heat energy change during a chemical reaction at constant pressure. It helps determine whether a reaction is exothermic (releases heat) or endothermic (absorbs heat), and is a central feature of thermochemical equations.

Reaction Feasibility

Reaction feasibility typically refers to the spontaneity of a reaction, which involves factors like activation energy and thermodynamic favorability. However, thermochemical equations do not provide any information about whether a reaction will occur or not; they solely describe the energy change associated with the reaction.

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