Enthalpy and States
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Re: Enthalpy and States
Enthalpy is heat absorbed or released at a constant pressure. Also, enthalpy is a state property so its specific value would be dependent on its current state, specifically the final minus the initial.
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Re: Enthalpy and States
Yes the state of matter will affect the enthalpy. A liquid of a substance will have a different enthalpy than a gas of the same substance.
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Re: Enthalpy and States
Yup! Enthalpy is related to states and the enthalpy change of one state will be different than the enthalpy change of a different state.
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Re: Enthalpy and States
State of matter does affect enthalpy. The value of enthalpy between liquid water and vapor will be different.
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Re: Enthalpy and States
The enthalpy of a substance in its gaseous form > enthalpy in liquid form > enthalpy in solid form.
This is because heat is required to change a substance from solid to liquid, and liquid to gas.
This is because heat is required to change a substance from solid to liquid, and liquid to gas.
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Re: Enthalpy and States
Yes, when calculating net enthalpy change, you will have to take into account enthalpy changes between states of matter
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Re: Enthalpy and States
Yes the state of matter will definitely affect enthalpy because different amounts of heat are required to change a substance through each phase.
Re: Enthalpy and States
State does affect enthalpy. That is why you need to add the enthalpy of the phase change for reactions where there is a phase change.
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