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Reading Skill.
1- What is "Enthalpy" ?

2- What is "Enthalpy of Reaction" ?

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1.the heat content of system at constant pressure
2- the change in enthalpy for a rection

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1- Enthalpy is the heat content of a system at constant pressure. 2- change in enthalpy.  heat absorbed or realised in chemical reaction
Enthalpy is impossible to measure but you can measure the change in enthalpy

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Enthalpy is the heat content of a system at constant pressure.

-we cant meaure the enthalpy of a substance

Enthalpy of reaction is the change in enthalpy for a reaction.

-we can mesure the change in ethalpy

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1) the sum of the internal energy and the product of the pressure and volume of a thermodynamic system. ..

2) CHANGE IN ENTHAPLY

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1 enthalpy; the heat content of a system at constant pressure.

2 the change of enthalpy is the change in enthalpy in reaction.
number 2 is the one that can be measured

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1)a thermodynamic number that represents a system's total heat content. It is equal to the sum of the system's internal energy and the product of pressure and volume.
2) change in enthalapy

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enthalpy : is the heat content of a system - you cannot measure the actual enthalpy of a substance

enthalpy of reaction : the change in enthalpy for a reaction - can be measure

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Enthalpy-is the heat content of a system at constant pressure
Enthalpy of reaction is change reaction

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1- The heat content of a system under constant pressure .

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Enthalpy is the heat content of a system at constant pressure.

you can measure the change in enthalpy but you cannot measure the actual energy or enthalpy of substance.

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-Enthalpy: is the the heat content of a system at a constant pressure.(Cannot be measured.)
- Enthalpy of reaction: The change in enthalpy for a reaction.(can be measured.)

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Enthalpy: is the heat content of a system at constant pressure.

Enthalpy of reaction: the change in enthalpy for reaction.

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1. enthalpy is the heat content of a system at constant pressure.
2. enthalpy reaction is the change in enthalpy for a reaction

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Enthalpy cant be measured and the Enthalpy of reaction can be measured.

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1. Enthalpy is the heat content of a system at constant pressure.

2. Enthalpy of reaction (delta Hrxn) is the change in enthalpy for a reaction.

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Enthalpy is a property of a thermodynamic system, and is defined as the sum of the system's internal energy and the product of its pressure and volume

of reaction or Heat of reaction is the heat change when the number of moles of reactants as shown in the chemical equation reacts in standard conditions to form products in standard conditions

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enthalpy is the heat of a system at constant pressure (unmeasurable)

enthalpy heat reaction change in enthalpy for a reaction(measurable)

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Enthalpy: is the heat content of a system at constant pressure. you can't measure it .

Enthalpy of reaction: the change in enthalpy for reaction. you can measure it.

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enthalpy is the heat content of a system the changes in enthalpy for a reaction is called the enthalpy of heat

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1. Enthalpy: is the heat content of a system at a constant pressure.
2. enthalpy of reaction : is the change in enthalpy for a reaction.