Delta H v. q

[LNgo 1G]

What is the difference between delta H and q?

[Izzie Capra 2E]

I believe that q is simply the heat that can be measured in a transfer. Enthalpy (delta H) is the total heat content in a system. It is energy, kind of like its potential energy RELATING to heat.

[Abby Soriano 1J]

Do you know why or how delta H is equal to qp? What about the constant pressure makes the two equal?

[Angela Prince 1J]

Delta H is equal to q only when the gas is at a constant pressure. By definition, enthalpy (deltaH) is the amount of heat released/absorbed at a CONSTANT PRESSURE, so the heat required to change temp of gas at a constant pressure is the same as enthalpy.

[Abby Soriano 1J]

Delta H is equal to q only when the gas is at a constant pressure. By definition, enthalpy (deltaH) is the amount of heat released/absorbed at a CONSTANT PRESSURE, so the heat required to change temp of gas at a constant pressure is the same as enthalpy.

So does that mean that the same does not hold for qv?

[ValerieChavarin 4F]

q refers to the energy, as heat, transferred due to a change in temperature. is the heat transferred at constant pressure