constant p

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constant p

Postby ursulavictorino1K » Sun Feb 09, 2020 9:13 pm

What does it mean if qp= deltaH?

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Re: constant p

Postby peteryim » Sun Feb 09, 2020 9:14 pm

This is the equation for change in enthalpy at constant pressure. At constant pressure, delta H is equal to the heat.

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Re: constant p

Postby 205007651 » Sun Feb 09, 2020 9:15 pm

Enthalpy (which equals H) is amount of heat released divided by what is absorbed(at constant pressure)

Sidharth D 1E
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Re: constant p

Postby Sidharth D 1E » Sun Feb 09, 2020 9:49 pm

It means that a change in the enthalpy of a system is equal to the heat released or absorbed at constant pressure. Since the external pressure is equivalent to the pressure of the system:
deltaH = q - P(deltaV) + P(deltaV), so deltaH equals q.

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Re: constant p

Postby kausalya_1k » Sun Feb 09, 2020 11:33 pm

the definition of enthalpy is heat at constant pressure, so enthalpy (delta H) is the same as heat (q), which is why in an isobaric problem you can use q=deltaH

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