Gaseous octane (c8h18) at 25c and 1 atm is burned with 100% dry air at 25c and 1 atm in a combustor operating at steady state. assume that products of “complete” combustion exit the combustor at 1500 k and 1 atm. (a) determine the heat transfer (kj/kg fuel) for the combustor. suppose the products of “complete” combustion exit the combustor at 298 k and 1 atm. (b) determine the heat transfer (kj/kg fuel) for the combustor.

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.

Lacie kicks a football from ground level at a velocity of 13.9 m/s and at an angle of 25.0° to the ground. how long will the ball be in the air before it lands? round your answer to the nearest tenth. s how far will the football travel before it lands? round your answer to the nearest tenth. m

Whithin which type of system is neither the total mass nor the total energy conserved ? a. open b. connected c. isolated d. closed