Methane gas (CH₄) is burned completely during a steady-flow combustion process. The fuel and the air enter the combustion chamber at 25°C, and the products leave at 1500 K. If the enthalpy of the products relative to the standard reference state is -451 MJ/kmol of fuel, the heat transfer from the combustion chamber is

Question

Quizplus · Accepted Answer

Solved by EES Software. Solutions can be verified by copying-and-pasting the following lines on a blank EES screen. 
hf_fuel=-74850/1000 "MJ/kmol fuel"
H_prod=-451 "MJ/kmol fuel"
H_react=hf_fuel
Q_out=H_react-H_prod
"Some Wrong Solutions with Common Mistakes:"
W1_Qout= -H_prod "Taking Qout to be H_prod"
W2_Qout= H_react+H_prod "Adding enthalpies instead of subtracting them"

Methane Gas (CH4) Is Burned Completely During a Steady-Flow Combustion

Methane Gas (CH₄) Is Burned Completely During a Steady-Flow Combustion