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## Main Question or Discussion Point

I have a pipe with a constant mass flow rate dm/dt of air being blown gently through which opens out into the atmosphere at both ends. At the middle point of this pipe it is heated at a constant rate dQ/dt. Assuming that the air is heated rapidly and all the heat is transferred to the gas is it possible to work out dQ/dt by measuring the temperature at the inlet and outlet and knowing dm/dt.

With an incompressible fluid this wouldn't be too hard but how would you do it for the gas since this is compressible? The enthalpy change = heat in. But how do you work out the enthalpy since this is neither constant pressure or volume? Any help appreciated

With an incompressible fluid this wouldn't be too hard but how would you do it for the gas since this is compressible? The enthalpy change = heat in. But how do you work out the enthalpy since this is neither constant pressure or volume? Any help appreciated