An electric-resistance heater in an air duct adds 40 kJ/kg of energy to a stream of a steadily flowing mixture of gases. The gases enter at 20°C and 1 atm and maintain approximately constant pressure throughout the heating process.

The kinetic and potential energy changes of the air are negligibly small during the process. If the mixture of gases is 10% water vapor, 20% oxygen, 30% carbon dioxide, and 40% nitrogen on a mass basis, determine the temperature of the exiting gas mixture (°C).

Answer rating: 100% (QA)

Solution ma mass fraction of Water Vapor mo mass fraction of Oxygen mco mass fractio... View the full answer