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Enthalpy

cava chem 303 s2d40 4.06 Enthalpy

QuestionAnswer
[...] is the total thermal energy content of a system at constant pressure. Enthalpy is the total thermal energy content of a system at constant pressure.
Enthalpy change is measured in terms of change in heat between the [...] and the [...]. Enthalpy change is measured in terms of change in heat between the products and the reactants.
Although you cannot measure the enthalpy (H) of either system directly, you can measure the [...] in enthalpy between the two systems. Although you cannot measure the enthalpy (H) of either system directly, you can measure the change in enthalpy between the two systems.
The change of enthalpy is noted with the symbol [...]. The change of enthalpy is noted with the symbol ΔH.
Exothermic reacitions have a [...] ΔH because the chemicals lose energy. Exothermic reacitions have a negative ΔH because the chemicals lose energy.
Endothermic reactions have a [...] ΔH because the chemicals gain energy. Endothermic reactions have a positive ΔH because the chemicals gain energy.
Changes in [s-], like chemical reactions, involve changes in enthalpy. Changes in state, like chemical reactions, involve changes in enthalpy.
The energy change during a state change is called "[...] heat" The energy change during a state change is called "latent heat"
latent heat of fusion = heat involved in [...] or [...]. latent heat of fusion = heat involved in melting or freezing.
latent heat of vaporization = heat involved in [...] or [...]. latent heat of vaporization = heat involved in evaporating or condensing.
Created by: mr.shapard