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## Homework Statement

Prior to entering a combustion furnace, air is heated up from ambient temperature (25 °C) to 250 °C. This change in temperature causes the specific enthalpy to change to 3745 J/mol. Assume that the pressure of the air leaving the heater is 150 kPa and the flow rate is 1.3 m3 /min. Assuming ideal behaviour, calculate the heat required in units of kW.

## Homework Equations

PV=nRT

H=U+PV

dH=Q

## The Attempt at a Solution

I can find P1 and V1 from the equation T1/T2=P1/P2 and V1/V2=P2/P1

P1=85.487 kpa

V1=136.863m^3

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