Methane gas (CH4) at 25oC, 1 atm, and a volumetric flow rate of 27m3/h enters a furnace operating at steady-state. The methane burns completely with 140% of theoretical air that enters at 127oC, 1 atm. Products of combustion exit at 427oC, 1 atm. Determine: (a) the volumetric flow rate of the air, in m3/h.
(b) the rate of heat transfer from the furnace, in kJ/h.

a)  

b)

Explanation:

Temperature of CH_4

CH_4Flow rate of

Air Percentage

Temperature of air

Temperature at exit

Generally the equation for Air's flow Rate is mathematically given by

Generally the equation for Ideal Gas is mathematically given by

Therefore

The rate of heat transfer from the furnace, in kJ/h is

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explanation: